* Remove ERC20_TOKEN_ADDRESS from env variables
* Do not check erc20 token address for native-to-erc
* Rename ERC20_TOKEN_ADDRESS to bridgeableTokenAddress
* Support other oracle's gas price values in Oracle
* Add default gas price factor in Oracle
* Support other oracle's gas price values in UI
* Support other oracle's gas price values in Monitor
* Moved audit to root directory.
* Moved code of conduct, contributing and licence files.
* Removed travis config and badge.
* Updated repository links in CONTRIBUTING.
* Moved Gitter badge to main readme. Updated links to contributing and licence.
* Updated main readme.
* Moved references to main readme.
* Renamed token-bridge to oracle.
* Update README.md
Co-Authored-By: rzadp <rzadp@student.mini.pw.edu.pl>