add icons
add a label in GroupUndoableCommands constructor
change the name of the third view
change the way to get undo/redo doc for a group of commands
can pass a directory in argument
beginning of catching when principal window close
clean code for more lisibility
add the description of buttle in the argparse
add paramChoice hint
saveData: fix url trouble
Close event: save and close the application when needed
main: fix for relative paths
buttleApp: make file executable on unix
Merge branch 'dev_menu' of github.com:buttleofx/ButtleOFX into dev_menu

Conflicts:
	buttleofx/main.py
saveData: could be called from QML or python

When called from QML we recieve a QUrl, when called from Python it could
be both (QUrl or str).

Remove useless default value.
add comment
replace finderSaveGraph and finderLoadGraph elements
fix an error on property urlOfFileToSave
catch alt+f4 event and exit event