o re-arrange directories.
o Document pre-requisites to be able to compile.
o use avrdude in standard configuration.
o Get rid of crap compiled-in but not needed.
o Fix indentation.
o Implement simple serial protocol.
o Add 'reset' command.
o Smallify string constants (things started to overwrite).
o current state:
   text    data     bss     dec     hex filename
   6080     346       0    6426    191a main.elf
o Some initial host stub.