Added message-box element type
Added touchpad element type
Added toolbar element type
Added button element type
Moved bottom toolbar CSS to separate file
Merge branch 'fixup-elements'
Moved cloneTouches to separate module
Include clientX and clientY in cloned touch
Added function to get viewport position of element
Merge branch 'feature-utils'
Use correct index for ImportError message
Added empty Windows osevent module
Added type defines for Windows functions
Added stubs for Windows osevent functions
Implemented mouse_down for Windows
Implemented mouse_up for Windows
Implemented mouse_scroll for Windows
Implemented mouse_move for Windows
Allow building on Windows
Added Windows to supported platform list