Working on #42

This is a first draft. Please review if this is okay.

- Added simple upstart script
- Added Keys
- Added Tasks
- Incremented sbt version to 0.13.0 for testing (maybe reverted in next
commits)

## What's left

Currently I have no idea where to put the Task so I can _activate_ them. Hints appreciated.
After I fixed this, I will test this with play and may  revert the sbt version to _0.12.4_ .