* Can now emulate a Model B with 1770 FDC
* Better mode 7 emulation - many programs improved, eg Granny´s Garden
* Added cursor to modes 0-6
* Altered video timing a little
* Added more commands to 1770 FDC - Watford DDFS now works (single density only)
* Some optimisations to video code
* Update VGM logging to latest spec