Add cfg to remove the ExternalSubs text
Added H.264 transcoding quality option

It works the same way as the MPEG-2 one
Made vertical spacing more uniform
Merge branch 'master' of github.com:UniversalMediaServer/UniversalMediaServer
Merge remote-tracking branch 'UMS/master' into Panasonic_subs
Simplify the code of string to time conversion
Update