removing use of -optimize.

For some context:

http://doc.akka.io/docs/akka/snapshot/intro/getting-started.html#Do_not_use_-optimize_Scala_compiler_flag
Add Bower.settings
Merge pull request #11 from Banno/add-bower

Create sbt plugin for Bower
Merge branch 'sbt-13' into 1.4.x

Conflicts:
	src/main/scala/BannoCompile.scala