initial commit; protocol w/ open, close, and set
with passwords and password hashing
moved ARM code to separate folder
Updated the UART IRQ handler to expect CRLF as a line terminator instead
of just CR.
Added a debug preprocessor to turn some output on and off.  Removed some
comments, other clean-up.
Further debug encapsulation and code clean-up
Merge pull request #1 from miralexan/master

Added ARM code