A toy Smalltalk in Python
Uses https://github.com/darius/parson for the parser.
You can start it in a terminal window with ./tinyhiss.sh and see
some instructions. (You'll need a wide terminal window because it'll
show two panes side-by-side.)
This is a nonstandard dialect, explained only by examples.
TODO Add changes.hiss to repo (and remove from .gitignore)? The instructions in tile1 aren't really right otherwise. Alternatively, add code to hiss.py to add the factorial method to the Number class.