[pvr] EPG hookdata: Return UniqueBroadcastID

Returns epgUid known by client instead unset data.
[gui] adds listitem info label inprogress to determine if epg item is in progress

This adds a new listitem info label inprogress which indicates if the
associated epg tag points to a current ongoing program.
libdvdcss-1.2.12 removed _XBOX unneeded patches
libdvdcss-1.2.12 updated diff files
libdvdcss update to 1.2.13 - incl diff file
libdvdread-libdvdnav update to 4.2.1
libdvdread-libdvdnav - remove unused xbmc patches
libdvdread-libdvdnav - updated diff files
correct codec names, MPEG is always written in upper-case
[cosmetic] add missing "l" in some comments
[epg] get rid of orientation support
[dxvahd] attempt to fix colour range
Added Container.IsUpdating
Don't keep temp CReadState on CurlFile::Seek

Apparently there are a lot of servers around that limit to two
concurrent connections.  This also eliminates a potential leak of the
temporary CReadState should the early return be taken.
Try CurlFile::Seek without multisession on failure
Minor refactor of CurlFile::Seek
[epg] cleanup: refactor/remove methods MoveChannel and MoveProgrammes
[epg] cosmetics: refactor, code formatting etc.
[epg] cleanup: remove unnecessary method CorrectOffset()
[epg] cosmetics: code formatting