Vx.x.x (Pre-release)

Changes since v2.2:

Remove Go v1.8.x from Travis CI testing
Add CODEOWNERS file
Add CONTRIBUTING guide
Add Issue and Pull Request templates
Add Dockerfile
Fix fsnotify import
Update README to reflect new repository ownership
Update CI scripts to separate linting and testing
- Now using gometalinter for linting
Move Go import path from github.com/bitly/oauth2_proxy to github.com/pusher/oauth2_proxy
Repository forked on 27/11/18
- README updated to include note that this repository is forked
- CHANGLOG created to track changes to repository from original fork