use org.scala-refactoring snapshots for 2.10 branch and upgrade a

variety of middleware components

Note that since scala 2.9 support is being dropped by the scala refactoring team

 https://github.com/scala-ide/scala-refactoring/issues/50

we should probably consider making a final 2.9.2 release and then dropping support from master... focussing on 2.10 and 2.11.