set compile time java opts to -Xms768M -Xmx1024M -XX:MaxPermSize=512M -XX:+CMSClassUnloadingEnabled
change play 2.0 to 2.x
Add sbt-0.12.2 support
Merge pull request #36 from ndeverge/sbt-0.12.2

Add sbt-0.12.2 support
add sbt-0.12.3 support
Merge pull request #40 from xuwei-k/sbt0.12.3

add sbt-0.12.3 support
Always vendor JDK
Merge pull request #41 from heroku/vendorjdk

Always vendor JDK
Skip logging
skip doc generation
remove erroneous version from Heroku plugin
Merge pull request #43 from heroku/no-doc-gen

No doc gen
merge master from https://github.com/heroku/heroku-buildpack-scala.git