Add TreeModel to void pointer conversion enabling getters/setters
remove Bool from ccall
Merge remote-tracking branch 'upstream/master' into listView
Make GtkTreeModelFiltered work and add various functions for TreeModel
GtkTreeSortableI defined
add GtkScrolledWindow
Add GtkToolbar and some related types
push! and unshift! for GtkToolbar now accept more arguments
merge upstream
fix GtkTreeSortableI definition
move GtkIconSize into an own file (also used in toolbar)
fix GtkSortType
Add GtkSeparatorToolItem and  GtkSeparatorToolItem
Add GtkMenuToolButton
Fixed various issues based on Jamesons comments
remove push! version of tree/list store that leaves the appended values uninitialized
Add more functions for GtkTreeSelection (hasselection, length,...)
Merge remote-tracking branch 'upstream/master' into listView
remove usage of pointer function
remove forgotten debug println