New API and functionality

Optional callbacks, better errors, more constraints to match game, stepping

Bug fixes

• short syntax for floor was broken
• accumulator not nulled after OUTBOX

Complete

Should now support everything in the game - added the [42] addressing thing

Verbose output

You can now get info on size and steps, see readme

0.0.4: More tests

Waiting for strings before 0.1.0

Tests passing for all levels in game will be 1.0.0?