NfoFile: do a range check before extracting a sub-string
NfoFile: simplify checking for multiple <episodedetails> elements
NfoFile: do a range check before calling GetDetails
Rebrand: change visual reference to new app name
Merge pull request #5485 from Montellese/fix_nfo_crash_15472

Fix episode NFO scraping
Merge pull request #5486 from Voyager1/rebrand

Rebrand: change visual occurrences of XBMC to reflect new app name