Add gdk.Pixbuf.ScaleSimple and gtk.Image.SetFromPixbuf.
add GetAllocated Height/Width
struct__GList -> GList
Added nearly full support for GtkStatusIcon (minus the GtkMenu popping)
Add gtk_menu_item_set_label
Added wrapper for gtk_clipboard_wait_for_text
Add PixbufNewFromFile and Pixbuf.RotateSimple.
Add wrapper GetSelectedRows for gtk_tree_selection_get_selected_rows

Some extran comments and code cleanup by @jrick.
Add basic support for working with a widget's GdkVisual
added Ubuntu specific install directions

added some command line arguments for installing gotk3 on Ubuntu 14.04.
Add ProgressBar.Get/SetShowText.

We already had the .SetText method, but without being able to actually
enable showing text, it was rather useless.
Cairo surface creation / drawing / write to PNG functions