Upgrade to sbt 0.13.1.
Update dependencies so we can build against 2.11.0-M7

Update dependencies to version numbers that are published against
both 2.10 and 2.11.0-M7. This way we can release sbinary from master for
both 2.10 and 2.11.0-M7.
Merge pull request #11 from gkossakowski/2.11-compat-for-master

Update dependencies so we can build against 2.11.0-M7
Initial travis CI file for PR validaiton.
Merge pull request #12 from harrah/wip/travis.yml

Initial travis CI file for PR validaiton.
Bump scalacheck to latest version for 2.11.0-M8 build.
Merge pull request #13 from harrah/wip/bump-scalacheck

Bump scalacheck to latest version for 2.11.0-M8 build.
Bump to scala 2.11.0