Lots of updates after integrating into simulator

Moved some util functions around

Updated README

Added trailing semicolon

Moved a few util functions around

HMMM.js is now a single file

Cleaned up assembler tests

Integrated the assembler into hmmm.js

Cleaned up tests. Added pretty printing function.

Parser now passes back errors upon failure. Octal literals switched to hex to maintain strict mode.

Improving error messages

Fancy color error output. Fixed some lexer bugs.

Rewrote parser as state machine. Probably needs cleanup,

Refactored lexer. Parser currently broken until it can consume new token format.

Fixed lexer bug with hexidecimal literals