generated missing copyright header
updated sbt idea plugin
Merge branch 'master' of github.com:flyway/flyway
added missing copyright header
updated sbt idea plugin to 1.5.2
fixed sbt 0.13 compatibilty issues
adjusting task and settings key names to sbt 0.13 conventions
updated sbt sample project
Merge pull request #643 from cdedie/master

migration to sbt 0.13