Set development version to 0.4-SNAPSHOT
Version upgrades

- sbt 0.13.2
- scala 2.11.0
- akka 2.3.2
- scalatest 2.1.3

and cross build 2.10.4, 2.11.0
Upgrade to Scalatest 2.1.4

- makes explicit scala-xml dependency obsolete
Upgrade to Akka 2.3.4
Merge branch 'master' into r-0.3

- upgrade to Akka 2.3.4
Set release version to 0.3.2
Merge branch 'master' into r-0.3

- set release version to 0.3.2