- Update 0.13.4:
* Fuzzing fixes bnc#1002982 CVE-2016-7969 CVE-2016-7972
* Improve compatibility/portablility of build system, should fix e.g. compilation on Solaris.
* Fix memory leak in DirectWrite font provider.
* Fix the rasterizer when rendering some large outlines.
* Remove hack that forced RTL base direction depending on font encoding.
* Greatly improve the internal caches with refcounting and gradual clearing.

- Update to 0.13.2
* Add ass_set_check_readorder() API function to disable use of
the ReadOrder field for duplicate checking in
ass_process_chunk().
* ass_step_sub(track, now, 0) now finds the start of the subtitle
at now.
* Bug fixes:
+ Fix an issue with the new duplicate checking, which could
lead to missing subtitles after seeking.
+ Fix a crash with Core Text under specific circumstances.

- Update to 0.13.1
* Much faster duplicate event check in ass_process_chunk.
* Interpret negative timestamp components as actual negative numbers.
* Look up fonts that contain PostScript outlines by their PostScript
name instead of their full names. Family names continue to be used for all fonts.
* Keep spaces in font names
* Drop support for Fontconfig < 2.10.92 to ensure correct font matching
* Fix some small memory leaks, potential crashes and bad data uses

- Update summary/description