Renamed Label parameter 'halign' to 'align'.  Fix for issue 460.
Renamed Label parameter 'halign' to 'align'.  Fix for issue 460.

infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore,infowantstobeseen/pyglet-darwincore