* Added the 'getChildAt()' method in the def file
* Fixed Enchant test
* FIx: added nullable to GtkAccelKey in def file of GtkAccelMap lookup_entry method to prevent rising nullpointers from within jg
* Exposed the method guessLanguage(String, String) in LanguageManager
* Exposed the WindowState 'FOCUSED' which may otherwise cause problems when retrieving window states such as maximized.
* Exposed the getChildAt(int, int) method in Grid
* Exposed the queryTooltip interface to connect with the widget. Which in turn also exposed the matching connect method.
* Exposed and documented Tooltip class. Not all methods are exposed. Only those which I find relevant for the class.
* Fix a rename on the queryTooltip to QueryTooltip as it should.
* Added all the methods for the tooltips for a TreeView.
* Took the exampleTooltip file and extended with custom tooltips.
* Treeview tooltip example now added
* FInal changes to the treeview tooltips example
Code formatting

Run code formatter on 'tooltips' branch.
Update AUTHORS
Minor stylistic updates
Merge branch 'tooltips'