[mythtv] [experimental patch] Teletext decoder for IVTV/DVB cards

[Frank Muenchow]

The latest experimental patch for Teletext(VBI) decoding for IVTV/DVB 
cards can be found at:

http://mitglied.lycos.de/beebof/myth.html

Changes since last patch:
- supports double height characters
- subpage selection (use cursor-left/right to select)
- display subtitle pages properly (hopefully)
- some code cleanup

TODO:
- select only available subpages
- header: cleanunp and updates
- still no PS support
- overrules 'T' for Teletext/cc
- teletext font definition
...


Remember: It's still experimental - Use at your own risk!


Frank