UPDATE: update NTSC XML to parity with 720p

* Updated NTSC XML from changes already included in 720p
* BUGFIX: this fixed script exceptions in NTSC mode because of missing buttons/IDs
UPDATE: minimize use of xbmc.Player( xbmc.PLAYER_CORE_MPLAYER ); add deprecation commentary

* xbmc.Player( xbmc.PLAYER_CORE_MPLAYER ) is deprecated [ see URLref: http://forum.xbmc.org/showthread.php?tid=173887&pid=1516662#pid1516662 ]
* using the CORE_MPLAYER is currently necessary to play .mp4 files (low/medium quality from Pandora)
* PENDING investigation about a bugfix for playing the stream or leaving the current API as is in Gotham [ see URLref: https://github.com/xbmc/xbmc/pull/1427 ]
UPDATE: regularize format of & disable some log messages