- removed support for ancient versions of ffmpeg
- some cleanup in Linux video player

git-svn-id: https://vcmi.svn.sourceforge.net/svnroot/vcmi/trunk@3163 4dfc6b2a-8b31-0410-aa91-d6c70e3ac834
* some work on hero crossover; still buggy

git-svn-id: https://vcmi.svn.sourceforge.net/svnroot/vcmi/trunk@3164 4dfc6b2a-8b31-0410-aa91-d6c70e3ac834