Merge pull request #7 from adriaanm/2.11

Compile on 2.11, introduce settings for dependency versions.
Bumping versions to M7 and its modules.

Drop oraclejdk6 target as Travis no longer supports it.
Merge pull request #8 from adriaanm/patch-1

Bumping versions to M7 and its modules.
Decouple includeTestDependencies and scalaVersion