* Removes references to tslint in contract-wrappers which are obsoleted since https://github.com/0xProject/protocol/pull/584 * Remove tslint references in contracts/utils and test utils obsoleted by https://github.com/0xProject/protocol/pull/589 * Remove tslint references in contracts/zeroex and test utils obsoleted by https://github.com/0xProject/protocol/pull/587 * Remove other obsoleted tslint references * Update contributing guidelines with eslint * Fix prettier errors