Merge branch 'development' into feature/portal-ledger-support

* development: (437 commits)
  Publish
  Update yarn.lock
  Update the CHANGELOG
  Fix the bug making it impossible to specify the custom ZRX address
  Fix fill/cancel order by looking for NoError instead of empty blockchainErr given the BlockchainErrs type refactor
  Add a comment about a yarn bug
  Add our mainnet and kovan nodes as backups for Portal requests
  Fix bug hiding the user info from topBar
  Add dev-utils package to top level README
  Prettier newline
  Prettier
  Allow Token symbols to be alphanumeric
  Update CHANGELOG, rebase on development
  Should not -> cannot
  Reject negative amounts in isValidBaseUnitAmount
  Re-add changelog for 0x.js
  Fix prettier
  Update yarn.lock
  Move tests to a separate folder
  Change file layout
  ...

# Conflicts:
#	packages/website/README.md

1 files changed, 73 insertions, 0 deletions

diff --git a/packages/deployer/README.md b/packages/deployer/README.md
new file mode 100644
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@@ -0,0 +1,73 @@
+## @0xproject/deployer
+
+This repository contains a CLI tool that facilitates compiling and deployment of smart contracts.
+
+## Installation
+
+```bash
+yarn add @0xproject/deployer
+```
+
+## Usage
+
+```bash
+node ./node_modules/@0xproject/deployer/lib/cli.js --help
+cli.js [command]
+
+Commands:
+  cli.js compile  compile contracts
+  cli.js migrate  compile and deploy contracts using migration scripts
+  cli.js deploy   deploy a single contract with provided arguments
+
+Options:
+  --version          Show version number                               [boolean]
+  --contracts-dir    path of contracts directory to compile
+              [string] [default: "/Users/leonidlogvinov/Dev/0x/0x.js/contracts"]
+  --network-id       mainnet=1, kovan=42, testrpc=50      [number] [default: 50]
+  --should-optimize  enable optimizer                 [boolean] [default: false]
+  --artifacts-dir    path to write contracts artifacts to
+       [string] [default: "/Users/leonidlogvinov/Dev/0x/0x.js/build/artifacts/"]
+  --jsonrpc-port     port connected to JSON RPC         [number] [default: 8545]
+  --gas-price        gasPrice to be used for transactions
+                                                [string] [default: "2000000000"]
+  --account          account to use for deploying contracts             [string]
+  --help             Show help                                         [boolean]
+```
+
+## Contributing
+
+We strongly recommend that the community help us make improvements and determine the future direction of the protocol. To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install Dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+```bash
+yarn build
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```