Mantis 4405
Update/fix the North American digital cable tuning detail files according to the links listed in the mantis issue.
Also, extend the included frequencies/channels from ~135 right up to 158 as-per modern extended digital cable systems.
Mantis #4380: Added previewbackground and defaultRemoveable png`s for Titan
Merge remote-tracking branch 'remotes/origin/BUG-4405-Errors_in_clear_QAM_tuning_detail_files'
Updated DVBC tuning details Denmark Yousee Copenhagen (Thanks BJ Eagle)
Updated DVBT tuning details Croatia (Thanks sledge123)
Updated DVBC tuning details The Netherlands REKAM and CAIWAY (Thanks pvanderp)
Updated DVBC tuning details The Netherlands - UPC (Thanks edterbak)
Merge branch 'master' of http://github.com/MediaPortal/MediaPortal-1 into FEAT_Last.fm_API_2.0
Removed incorrect comment