[M2TS Muxer] added HEVC/x265 and MKV support (requires tsmuxer 2.5.5+)
[OneClick] added HEVC/x265 support for MP4 and removed it for MKV


git-svn-id: http://svn.code.sf.net/p/megui/code@2436 a21b8521-4df1-4ed3-b48c-cff5bc73dcb3
[OneClick] improved working directory generation
           improved handling if selected output container cannot be used


git-svn-id: http://svn.code.sf.net/p/megui/code@2437 a21b8521-4df1-4ed3-b48c-cff5bc73dcb3