Fixed incorrect example for prefix
Updated resolvers
Update sbt-release as gseitz' repo is no longer available.

New releases are also available in scalasbt.artifactoryonline repo.
Update play sbt plugin, add build.props with working/available sbt version

The play sbt plugin for sbt 0.12 is not yet available (will be coming with
play 2.1 as it seems)
Add sbt eclipse plugin
Add support for gauges
Push play to 2.0.4
Merge pull request #2 from magro/master

Update play/deps, add sending gauges