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Allow urls in local playlists + provide fallback item names
Accomodate relative urls in playlists
Additional null check for resume files thumbnail
Merge pull request #306 from tdcosta100/fix-resume-thumbnail

Additional null check for thumbnail of resume files
Merge branch 'master' of github.com:UniversalMediaServer/UniversalMediaServer into 4.0.0
Fixed and changed the transcoding option names available to renderers.

The name H264TSAC3 didn't make sense since it uses the MPEG-TS container, so to fix that and make them all consistent with the correct naming system, they are now MPEGPS-MPEG2-AC3, MPEGTS-MPEG2-AC3, MPEGTS-H264-AC3, MPEGTS-H264-AAC and WMV.