ROO-3106: Spring Roo doesn't support new Java 7 language features

Removed antlrjavaparser wrapper dependency and added antlr-java-parser-1.0.6
ROO-3335: Roo creates new C.U. when entity changes

Upgraded antlr-java-parser to 1.0.7 for better comment support.
Merge pull request #25 from mikedehaan/master

Upgraded antlr-java-parser to support OSGi and comments