Add heads for libebml and libmatroska

Add links to the master versions of libebml and libmatroska.
Revert "Add heads for libebml and libmatroska"

This reverts commit 7600af92f95f435ac34393e9a6ebf91e6b2c15a6.
Add head for libebml
Add head for libmatroska
libmatroska: update 1.4.1 bottle.
libebml: update 1.3.0 bottle.