begin to implement tandy/pcjr video modes
allow loading 8x8 ROM fonts
Merge branch 'develop' into feature_tandy_video
allow loading rom fonts of any height; enable 9-pixel vga characters (but the 8-pixel ones look better on modern screens)
improvements in bit-font handling; added standard fonts to bitfont directory
new font&codepage system
simplified unicodepage.py
changed command line options to --codepage and --font-family
added Armenian, Farsi fonts and unicode mappings
implemented ability to force load fonts irrespective of codepage
tandy/pcjr sysntax for screen, clear (effects not yet implemented)
added Thai fonts and TIS620
Merge branch 'develop' into feature_tandy_video
allow universal newlines by default; use --strict-newlines for GW behaviour
fix sound_beep crash due to uninitialised now_playing
fix non-execution of statements if --quit given
added strict-newline option to PCBASIC.INI
implemented --max-files -f option
implemented --max-reclen -s option
implemented --serial-in-size -c option