ADD: Functions to GeometryBuffer interface to enable/disable clipping region on batches of geometry.
ADD: Functions to GeometryBuffer interface to enable/disable clipping region on batches of geometry.

cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two,cbeck88/cegui-mirror-two