Got recursive associations working and lollipop notation working. Fixed some issues with association/inheritance lines disappearing.
Merge branch 'mvcDevelop' of bitbucket.org:nul/alphaomega into mvcDevelop
removed print statements
Fixed issue #21 to the best of my knowledge - as it is a very hard bug to reproduce I can't say for certain. Please reopen this ticket if anyone manages to reproduce it, and attach the stack trace.
Fixed issue #15 by making save operation clear the undo redo history, which was desired behaviour anyway. Bonus feature got around to preventing selection operations from being undoable.
Implemented adding of filename to the application title bar
resolved issue #16: Modify operation is now aware of automatically created parents