Merge pull request #36 from zulus/master

BuildPathResolver
simple Trait resolver for ImplementationValidator

Currently only for checked class
Cleanup
Merge branch 'master' of github.com:pdt-eg/Core-Plugin
updated to pdt 3.2 / dltk 5.0 dependenies
Better trait checker, works on multi classes per file (as in tests)
Merge branch 'master' of git://github.com/pdt-eg/Core-Plugin into implementation_validator