Adapted the MAXDuino ID19 code and TurboMode for ZX80/81. To access Turbo Mode for ZX80/81 and Electron please switch Turbo Mode On in the menu
Also added UEF Chunk 117 which allows for differing baudrates in BBC UEFs.
Added a Spectrum Font for OLED 1306 users converted by Brendan Alford. Option added to userconfig.h
Added File scrolling by holding up or down buttons. By Brendan Alford.