Author: Simey Lameze
MDL-59142 core_theme: cache post-processed css
Thanks Cameron Ball for the base patch
http://git.moodle.org/gw?p=moodle.git;a=commit;h=59527f3e7a8eb4e19245d40a96d773fc2f378363
http://github.com/moodle/moodle/commit/59527f3e7a8eb4e19245d40a96d773fc2f378363
+ 3.2 en [cachedef_postprocessedcss,core_cache]