Setup proper git workflow and start publishing snapshots to bintray

[JohnnyJayJay]

Currently, the project workflow is very basic. Since there is only one contributor and the entire project is still pre-ALPHA, most of the commits are made directly to the master branch and to integrate mela-command, the repo needs to be cloned and built manually.

In the future, this should change, by:

• implementing semantic versioning
• using a develop as well as feature/patch branches and committing big changes using pull requests
• publishing snapshot versions to jcenter bintray