[GreenKeys] USB-teletype adapters (update)

[epvgk at limpoc.com]

Hi Folks, 

Just an update. Manufacturing is in progress, they're supposed to be done
April 20th. I'm building enough for everyone who's asked so far plus some
extras. I don't want to take anybody's money until the boards are in my 
hands and I know there are no problems. 

Software updates:

selectable/modifiable translation tables: you can have up to 6 separate
	tables and switch between them.  You can create or overwrite tables
	by entering them in hex at the config command line. 

bidirectional break handling: detects break in the loop, and can break the
	loop if it gets a break signal from the host. 

ASCII mode: seems to work, but I have no 33 to test with.  Particularly I don't 
	know how real machines handle/require parity, etc. 

eric