Theora: Ptalarbvorm project update 20100518

Monty of Xiph.org Foundation has given us a demonstration update of the latest development going into the Ptalarbvorm Theora encoder, which is lined-up to be released as libtheora 1.2.  The demo includes screenshots comparing the latest development code with the last release, libtheora 1.1.1 a.k.a., Thusnelda.