Many versions upgrade and Build.scala improvements:
- ama project version upgraded to 0.4.1 (from 0.4.0)
- SBT upgraded to 0.13.2-M3
- Akka upgraded to 2.3.0
- logback upgraded to 1.1.1
- sbt-pack upgraded to 0.5.1
- allow SBT to work offline
- reorganisation of all Build.scala (Scalariform settings moved to external object)
- in Scalariform removed rewriteArrowSymbols=true (so it is disabled by default)

Generated new distribution.