* Adding docker image and release scripts
* Using circleci version 2
* now building dumb-init and gosu from source
* trying to fix e2e tests
* fixing working directory for circleci version 2
* start atlantis server and ngrok in the background
* Adding terraform to path and removing old decryption method for circleci
* adding terraform binary to the correct path
* ATLANTIS_URL is now being exported
* using circleci version 2 syntax to export variable
* using circleci version 2 syntax to export variable
* ngrok isnt working now
* Updating CHANGELOG
* Fixes after review and updated README.md
* Adding e2e tests back and upgrading terraform version 0.9.11
* Fixing the binary name for e2e tests
* revert binary name change
* missed indentation for makefile
* use owner name for branch head for pull request creation
* added new flags `plan-backend`, `plan-s3-bucket`, `plan-s3-prefix` and deleted `s3-bucket`
* interface `plan.Backend` that is implemented by `file` and `s3`
* simplified s3 code
* didn't end up following my suggestions in #30 since storing stuff in metadata requires you to `Get` the object *first* and then use the metadata. By parsing the `Key` to get repo, pull, path, and env, it skips an initial `Get` step, and I can download directly to the correct directory
* allow users to specify `application/json` or `application/x-www-form-urlencoded` for the webhook delivery type
* remove sending of special header for pull request api (fixes#11)
Closes#30 and #17 and #11
