Applet to support microwire bus and specifically the 93xx series EEPROM.

This is what I "hacked" together last night and it might need some more work but I thought it could still be useful.
https://github.com/smunaut/Glasgow/tree/microwire

It's mostly based off the SPI applet. Mostly the difference in gateware are:

• The edges (output and captures on the falling edge)
• The ability to shift arbitrary number of bits (and not just entire bytes)

Support is very basic but it was enough for me to read an EEPROM, erase it and reflash it.
The device I was working on has been resoldered back in place now, so I don't have anything to test further.