Log Message:
Update to 0.11.1:

libass (0.11.1)
 * Fix distfile generation
 * No functional changes

libass (0.11.0)
 * Add bitmap run combining/compositing
   This changes the text rendering model and increases compatibility with
   VSFilter. It may make rendering faster or slower in certain cases.
 * Add AVX/SSE2 implementations for \be and compositing
   This adds yasm as (optional) build dependency.
 * Add ass_library_version() API funcion (GC #113)
 * Add 'profile' program for benchmarks
 * Improve gaussian blur
 * Fix compilation with MSVC 2013
 * Speed up HarfBuzz shaper
 * Speed up cache
 * Notable compatibility bugfixes
   * Reset origin on \fay changes (GC #88)
   * Tons of parser fixes
   * Fix ascender/descender metrics (GH #8)
   * Fix \pbo sign and scaling
   * Don't reset wrap style on \r (GC #116, GH #45)
 * Notable bugfixes:
   * Correctly handle @font advance (GC #94)
   * Disable ligatures for non-zero \fsp
   * Make sure to release vector clip (GH #22)