Bump version to 0.8.0-SNAPSHOT
Update to slick 2.1.0-M2
Update play version to 2.3.1
Update sbt version in samples to 0.13.5
Remove unnecessary plugins.sbt
Cross compile against scala 2.10 and 2.11
Merge pull request #182 from pvlugter/slick-2.1

Update to Slick 2.1