Removed threads initialization as it is not needed with Gtk3/Sugar3
Modified comments to reflect name change for module.
add spacing.
Updated some minor path information in comments.
Fleshed out a new core for cross-platform use, hence the renamed sugar_ovc.py
Added comments and logger.
Added temporary empty icons as placeholders for tests.
Removed all Gtk.Window references and tied to Gtk.Grid.
Further extended Gtk.Window and moved all related window methods from Gui code.

Instantiated and attached Gui to ovc Window.