Re-add changelog for 0x.js

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diff --git a/packages/0x.js/CHANGELOG.md b/packages/0x.js/CHANGELOG.md
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+# CHANGELOG
+
+v0.22.6 - _November 10, 2017_
+------------------------
+    * Add a timeout parameter to transaction awaiting (#206)
+
+v0.22.5 - _November 7, 2017_
+------------------------
+    * Re-publish v0.22.4 to fix publishing issue
+
+v0.22.4 - _October 25, 2017_
+------------------------
+    * Upgraded bignumber.js to a new version that ships with native typings
+
+v0.22.3 - _October 25, 2017_
+------------------------
+    * Fixed an issue with new version of testrpc and unlimited proxy allowance (#199)
+
+v0.22.2 - _October 24, 2017_
+------------------------
+    * Fixed rounding of maker fill amount and incorrect validation of partial fees (#197)
+
+v0.22.0 - _October 16, 2017_
+------------------------
+    * Started using `OrderFillRequest` interface instead of `OrderFillOrKillRequest` interface for `zeroEx.exchange.batchFillOrKill` (#187)
+    * Removed `OrderFillOrKillRequest` (#187)
+
+v0.21.4 - _October 13, 2017_
+------------------------
+    * Made 0x.js more type-safe by making `getLogsAsync` and `subscribe/subscribeAsync` generics parametrized with arg type (#194)
+
+v0.21.3 - _October 12, 2017_
+------------------------
+    * Fixed a bug causing order fills to throw `INSUFFICIENT_TAKER_ALLOWANCE` (#193)
+
+v0.21.2 - _October 11, 2017_
+------------------------
+    * Exported `ContractEventArg` as a public type (#190)
+
+v0.21.1 - _October 11, 2017_
+------------------------
+    * Fixed a bug in subscriptions (#189)
+
+v0.21.0 - _October 10, 2017_
+------------------------
+    * Complete rewrite of subscription logic (#182)
+        * Subscriptions no longer return historical logs. If you want them - use `getLogsAsync`
+        * Subscriptions now use [ethereumjs-blockstream](https://github.com/ethereumjs/ethereumjs-blockstream) under the hood
+            * Subscriptions correctly handle block re-orgs (forks)
+            * Subscriptions correctly backfill logs (connection problems)
+            * They no longer setup filters on the underlying nodes, so you can use them with infura without a filter Subprovider
+        * Removed `ContractEventEmitter` and added `LogEvent`
+        * Renamed `zeroEx.token.subscribeAsync` to `zeroEx.token.subscribe`
+        * Added `zeroEx.token.unsubscribe` and `zeroEx.exchange.unsubscribe`
+        * Renamed `zeroEx.exchange.stopWatchingAllEventsAsync` to `zeroEx.exhange.unsubscribeAll`
+        * Renamed `zeroEx.token.stopWatchingAllEventsAsync` to `zeroEx.token.unsubscribeAll`
+    * Fixed the batch fills validation by emulating all balance & proxy allowance changes (#185)
+
+v0.20.0 - _October 5, 2017_
+------------------------
+    * Add `zeroEx.token.getLogsAsync` (#178)
+    * Add `zeroEx.exchange.getLogsAsync` (#178)
+    * Fixed fees validation when one of the tokens transferred is ZRX (#181)
+
+v0.19.0 - _September 29, 2017_
+------------------------
+    * Made order validation optional  (#172)
+    * Added Ropsten testnet support (#173)
+    * Fixed a bug causing awaitTransactionMinedAsync to DDos backend nodes (#175)
+
+v0.18.0 - _September 26, 2017_
+------------------------
+    * Added `zeroEx.exchange.validateOrderFillableOrThrowAsync` to simplify orderbook pruning (#170)
+
+v0.17.0 - _September 26, 2017_
+------------------------
+    * Made `zeroEx.exchange.getZRXTokenAddressAsync` public (#171)
+
+v0.16.0 - _September 20, 2017_
+------------------------
+    * Added the ability to specify custom contract addresses to be used with 0x.js (#165)
+        * ZeroExConfig.exchangeContractAddress
+        * ZeroExConfig.tokenRegistryContractAddress
+        * ZeroExConfig.etherTokenContractAddress
+    * Added `zeroEx.tokenRegistry.getContractAddressAsync` (#165)
+
+v0.15.0 - _September 8, 2017_
+------------------------
+    * Added the ability to specify a historical `blockNumber` at which to query the blockchain's state when calling a token or exchange method (#161)
+
+v0.14.2 - _September 7, 2017_
+------------------------
+    * Fixed an issue with bignumber.js types not found (#160)
+
+v0.14.1 - _September 7, 2017_
+------------------------
+    * Fixed an issue with Artifact type not found (#159)
+
+v0.14.0 - _September 6, 2017_
+------------------------
+    * Added `zeroEx.exchange.throwLogErrorsAsErrors` method to public interface (#157)
+    * Fixed an issue with overlapping async intervals in `zeroEx.awaitTransactionMinedAsync` (#157)
+    * Fixed an issue with log decoder returning `BigNumber`s as `strings` (#157)
+
+v0.13.0 - _September 6, 2017_
+------------------------
+    * Made all the functions submitting transactions to the network to immediately return transaction hash (#151)
+    * Added `zeroEx.awaitTransactionMinedAsync` (#151)
+    * Added `TransactionReceiptWithDecodedLogs`, `LogWithDecodedArgs`, `DecodedLogArgs` to public types (#151)
+    * Added signature validation to `validateFillOrderThrowIfInvalidAsync` (#152)
+
+v0.12.1 - _September 2, 2017_
+------------------------
+    * Added the support for web3@1.x.x provider (#142)
+    * Added the optional `zeroExConfig`  parameter to the constructor of `ZeroEx` (#139)
+    * Added the ability to specify `gasPrice` when instantiating `ZeroEx` (#139)
+
+v0.11.0 - _August 24, 2017_
+------------------------
+    * Added `zeroEx.token.setUnlimitedProxyAllowanceAsync` (#137)
+    * Added `zeroEx.token.setUnlimitedAllowanceAsync` (#137)
+    * Added `zeroEx.token.UNLIMITED_ALLOWANCE_IN_BASE_UNITS` (#137)
+
+v0.10.4 - _Aug 24, 2017_
+------------------------
+    * Fixed a bug where checksummed addresses were being pulled from artifacts and not lower-cased. (#135)
+
+v0.10.1 - _Aug 24, 2017_
+------------------------
+    * Added `zeroEx.exchange.validateFillOrderThrowIfInvalidAsync` (#128)
+    * Added `zeroEx.exchange.validateFillOrKillOrderThrowIfInvalidAsync` (#128)
+    * Added `zeroEx.exchange.validateCancelOrderThrowIfInvalidAsync` (#128)
+    * Added `zeroEx.exchange.isRoundingErrorAsync` (#128)
+    * Added `zeroEx.proxy.getContractAddressAsync` (#130)
+    * Added `zeroEx.tokenRegistry.getTokenAddressesAsync` (#132)
+    * Added `zeroEx.tokenRegistry.getTokenAddressBySymbolIfExistsAsync` (#132)
+    * Added `zeroEx.tokenRegistry.getTokenAddressByNameIfExistsAsync` (#132)
+    * Added `zeroEx.tokenRegistry.getTokenBySymbolIfExistsAsync` (#132)
+    * Added `zeroEx.tokenRegistry.getTokenByNameIfExistsAsync` (#132)
+    * Added clear error message when checksummed address is passed to a public method (#124)
+    * Fixes the description of `shouldThrowOnInsufficientBalanceOrAllowance` in docs (#127)
+
+v0.9.3 - _Aug 22, 2017_
+------------------------
+    * Update contract artifacts to include latest Kovan and Mainnet deploys (#118)
+
+v0.9.2 - _Aug 21, 2017_
+------------------------
+    * *This version was unpublished because of a publishing issue.*
+    * Update contract artifacts to include latest Kovan and Mainnet deploys (#118)
+
+v0.9.1 - _Aug. 16, 2017_
+------------------------
+    * Fixed the bug causing `zeroEx.token.getBalanceAsync()` to fail if no addresses available (#120)
+
+v0.9.0 - _Jul. 26, 2017_
+------------------------
+    * Migrated to the new version of smart contracts (#101)
+    * Removed the ability to call methods on multiple authorized Exchange smart contracts (#106)
+    * Made `zeroEx.getOrderHashHex` a static method (#107)
+    * Cached `net_version` requests and invalidate the cache on calls to `setProvider` (#95)
+    * Renamed `zeroEx.exchange.batchCancelOrderAsync` to `zeroEx.exchange.batchCancelOrdersAsync`
+    * Renamed `zeroEx.exchange.batchFillOrderAsync` to `zeroEx.exchange.batchFillOrdersAsync`
+    * Updated to typescript v2.4 (#104)
+    * Fixed an issue with incorrect balance/allowance validation when ZRX is one of the tokens traded (#109)
+
+v0.8.0 - _Jul. 4, 2017_
+------------------------
+    * Added the ability to call methods on different authorized versions of the Exchange smart contract (#82)
+    * Updated contract artifacts to reflect latest changes to the smart contracts (0xproject/contracts#59)
+    * Added `zeroEx.proxy.isAuthorizedAsync` and `zeroEx.proxy.getAuthorizedAddressesAsync` (#89)
+    * Added `zeroEx.token.subscribeAsync` (#90)
+    * Made contract invalidation functions private (#90)
+        * `zeroEx.token.invalidateContractInstancesAsync`
+        * `zeroEx.exchange.invalidateContractInstancesAsync`
+        * `zeroEx.proxy.invalidateContractInstance`
+        * `zeroEx.tokenRegistry.invalidateContractInstance`
+    * Fixed the bug where `zeroEx.setProviderAsync` didn't invalidate etherToken contract's instance
+
+v0.7.1 - _Jun. 26, 2017_
+------------------------
+    * Added the ability to convert Ether to wrapped Ether tokens and back via `zeroEx.etherToken.depostAsync` and `zeroEx.etherToken.withdrawAsync` (#81)
+
+v0.7.0 - _Jun. 22, 2017_
+------------------------
+    * Added Kovan smart contract artifacts (#78)
+    * Started returning fillAmount from `fillOrderAsync` and `fillUpToAsync` (#72)
+    * Started returning cancelledAmount from `cancelOrderAsync` (#72)
+    * Renamed type `LogCancelArgs` to `LogCancelContractEventArgs` and `LogFillArgs` to `LogFillContractEventArgs`
+
+v0.6.2 - _Jun. 21, 2017_
+------------------------
+    * Reduced bundle size
+    * Improved documentation
+
+v0.6.1 - _Jun. 19, 2017_
+------------------------
+    * Improved documentation
+
+v0.6.0 - _Jun. 19, 2017_
+------------------------
+    * Made `ZeroEx` class accept `Web3Provider` instance instead of `Web3` instance
+    * Added types for contract event arguments
+
+v0.5.2 - _Jun. 15, 2017_
+------------------------
+    * Fixed the bug in `postpublish` script that caused that only unminified UMD bundle was uploaded to release page
+
+v0.5.1 - _Jun. 15, 2017_
+------------------------
+    * Added `postpublish` script to publish to Github Releases with assets.