Fix README.md and ibm4704.txt

Change IS_COMMAND macro

Merge branch 'ibm4704'

Add converter/ibm4704_usb

Rename a file

Change keymap_plain.c

Change pin configuration

Add connector pinouts

Add doc 4704.txt and protocol comment

Add keymap_hasu.c

Add README.md

Change error no and clean debug code

Tweak keyboard initialize

Add Initial files of 4704_usb

Make modifiers 'weak' in macro

Spellchecking keyboard README files.

Spellchecking converter README files.

Merge pull request #92 from bgould/upstream

Added NeXT keyboard converter

Added NeXT keyboard converter

Merge pull request #90 from thomasrussellmurphy/master

Spellcheck of README.md and Documentation