MOS6551 ACIA at address $C000 which does buffered input and output via the
console. Updated the README with a bit more documentation, and bumped the
version number to 0.1 because I'm impatient.
- Removed the CommandParser class entirely, as the weird dependency between
Simulator and CommandParser never made me comfortable.
- Added a Command inner class to Simulator that handles some of the
command line tokenizing.