Add Git projects cache
Rename some custom Git helpers
Use global git projects cache for all IDE related code
Add Path helpers
Add .gitignore utilities
Fix method names in core Java DOM
Add GitIgnoreFilter to IdeDocumentListener
Bump sk.stuba.fiit.perconik.utilities to 0.3.3
Bump sk.stuba.fiit.perconik.eclipse to 0.6.0
Bump sk.stuba.fiit.perconik.core.java to 0.5.0
Bump sk.stuba.fiit.perconik.core.java.examples to 0.5.0