Bump sbt from 0.13.2 to 0.13.6
Add Travis CI settings
Bumped minor versions of libraryDependencies, add dependencyOverrides for scala-lang deps
Merge pull request #423 from seratch/feature/sbt-0.13.6

Bump sbt from 0.13.2 to 0.13.6
Merge pull request #424 from seratch/feature/travis

Add Travis CI settings
Merge pull request #425 from seratch/feature/deps-minor-updates

Bumped minor versions of libraryDependencies, add dependencyOverrides for scala-lang deps