Merge branch 'dev-section-redesign' into reSkinReferenceDocs

* dev-section-redesign: (87 commits)
  Added note about restriction on `testDirectory`
  fix(dev-utils): Make chai a dev dependency since exported interface depends on it
  Add changelog entries
  fix(subproviders): make web3-provider-engine types a 'dependency' so it's available to users of the library
  fix(sra-spec): make @loopback/openapi-v3-types a 'dependency' so it's available to users of the library
  fix(sol-cov): make @types/solidity-parser-antlr a 'dependency' so it's available to users of the library
  fix(dev-utils): make web3-provider-engine types a 'dependency' so it's available to users of the library
  fix(0x.js): make web3-provider-engine types a 'dependency' so it's available to users of the library
  fix(monorepo-scripts): Move the creation of the `.installation-test` directory OUTSIDE of the monorepo root, so that the installed packages can't reference the hoisted node_modules folder
  Remove ContractNotFound errors in contract-wrappers
  Update prettierignore
  Update website to use the new unsubscribeAll method in contract-wrappers
  In abi-gen-wrappers, ./wrappers -> ./src/generated-wrappers
  In contract-wrappers, remove setProvider and add unsubscribeAll method.
  take out explicit children definition in props
  Update json-schemas for contract-wrappers
  Add OrThrow suffix to getContractAddressesForNetwork
  remove unused import
  Update CHANGELOG.json for all changed packages
  Remove ContractAddresses from packages/types (mistake after rebase)
  ...

2 files changed, 17 insertions, 2 deletions

diff --git a/packages/contract-wrappers/src/utils/contract_addresses.ts b/packages/contract-wrappers/src/utils/contract_addresses.ts
new file mode 100644
index 000000000..98967c52d
--- /dev/null
+++ b/packages/contract-wrappers/src/utils/contract_addresses.ts
@@ -0,0 +1,15 @@
+import { ContractAddresses, getContractAddressesForNetworkOrThrow, NetworkId } from '@0xproject/contract-addresses';
+import * as _ from 'lodash';
+
+/**
+ * Returns the default contract addresses for the given networkId or throws with
+ * a context-specific error message if the networkId is not recognized.
+ */
+export function _getDefaultContractAddresses(networkId: number): ContractAddresses {
+    if (!(networkId in NetworkId)) {
+        throw new Error(
+            `No default contract addresses found for the given network id (${networkId}). If you want to use ContractWrappers on this network, you must manually pass in the contract address(es) to the constructor.`,
+        );
+    }
+    return getContractAddressesForNetworkOrThrow(networkId);
+}
diff --git a/packages/contract-wrappers/src/utils/transaction_encoder.ts b/packages/contract-wrappers/src/utils/transaction_encoder.ts
index 33086944b..d179fa07e 100644
--- a/packages/contract-wrappers/src/utils/transaction_encoder.ts
+++ b/packages/contract-wrappers/src/utils/transaction_encoder.ts
@@ -1,11 +1,11 @@
+import { ExchangeContract } from '@0xproject/abi-gen-wrappers';
+
 import { schemas } from '@0xproject/json-schemas';
 import { eip712Utils } from '@0xproject/order-utils';
 import { Order, SignedOrder } from '@0xproject/types';
 import { BigNumber, signTypedDataUtils } from '@0xproject/utils';
 import _ = require('lodash');
 
-import { ExchangeContract } from '../contract_wrappers/generated/exchange';
-
 import { assert } from './assert';
 
 /**