Log Message:
libass: updated to 0.14.0

libass (0.14.0)
* Brand new, faster and better outline stroker (replaces FreeType stroker)
* Remove option to use the FreeType rasterizer
* Fix spots of missing border around self-intersecting shapes
* Switch from Yasm to NASM for building hand-written assembler code
* Support Core Text font provider on Mac OS X 10.6 and 10.7
* Clear font cache in ass_set_fonts(). This fixes potentially incorrect
  font choices and an occasional crash if this function is called midway
  through rendering a file.