Added a simple verification to NbJavaModel.
Other sources (and javadoc) can now be accessed through NbJavaModule.
AttacherListener now adds all relevant sources again.
JavaExtension is always on the project's lookup.
AttacherListener now properly sets jar files as sources.
Removed unneeded flag from AttacherListener.
"Skip tests" no longer breaks the default tasks set for run single and debug single.
Merge branch 'master' into gradle_1.8_tooling_api