Log Message:
Updated libmatroska to 1.4.5.

2016-07-02  Moritz Bunkus  <moritz@bunkus.org>

        * Released v1.4.5.

2016-04-24  Moritz Bunkus  <moritz@bunkus.org>

        * KaxSemantic: add new colour-related elements.

2016-04-01  Steve Lhomme  <slhomme@matroska.org>

        * KaxSemantic: add the new FieldOrder element.

2015-11-21  Moritz Bunkus  <moritz@bunkus.org>

        * KaxVersion.cpp: in order to enable deterministic builds the
        KaxCodeDate variable has been set to "Unknown" instead of the date
        and time of compilation. Patch by Ed Schouten <ed@nuxi.nl>.