[PS3] Showtime HTPC Media v2.99.534

Changelog: Fix pixmap compositioning to correctly compute DST alpha. It's slow and needs to be fixed, but does the right thing Use pixmap compositing in font rendering (reduce code duplication). Add support for rendering of drop shadow and outline in font rendering. Improve rich text attrib parser. Can now handle and tags. Add spill margin to pixmaps. This allows text rendering to spill graphics outside of the bounding box. Stuff such as outline and shadows. Detect and resolve collisions of video overlay objects.