Remove play-activate-mysql test because it is out of date
Remove play-scala-mongodb test because it is out of date
Update play-slick and move to play2-scala-slick

- Move to play2-scala directory and generate config
- Update to Play 2.3
- Update to Scala 2.11
- Update to Slick 2.1
- Update other libraries
- Refactor and simplify code so it can be shared by Anorm
Update play2-scala-anorm test

- Update to Play 2.3
- Update to Scala 2.11
- Update other libraries
- Refactor and to use code shared by Slick
Misc play2 updates

Update play-slick and move to play2-scala-slick

- Update to Play 2.3.3
- Update to Scala 2.11
- Update MySQL connector library