Implement FORTH.

[skx]

I found a FORTH implementation for a Z80 system here:

• https://github.com/rachel8973/RC2014-FORTH

However it assumes that there is a lot more RAM than available; the driver is essentially the same as that used in our BASIC example - so porting it should be trivial - I've ordered some SPI FLASH-RAM which will allow me to access 64k of RAM, however the downside will be that such external RAM will be mandatory.

Still it will be a good "big" example to add.