Clean up
Filter files internal to Git in IdeDocumentListener
Add EGit dependency
Add GitRepositoryListener support
Add TODOs
Add debug Git repository change listener
Bump feature and plugin versions
Export missing packages
Update EGit dependency version
Try to fix some preferences issues
Partially draft upcoming changes to custom Git helpers
Export packages with Core Java DOM examples
Refactor JGit helpers
Add more preconditions
Supress restriction on EGit core

Not quite sure why is EGit core discouraged to access
Refactor helpers in IdeData and IdeGitProjects
Make listener configuration internals package private
Fix and refactor IdeGitProjects and IdeData helpers
Fix minor stuff in JavaProjects helpers
Fix possible nulls in GitProjects