App parses method definitions
App parses `self`
Better comments
App parses instance variable setting/getting
App passes all existing tests (namely the small accpetance test)
Expressions grouped under the key "expressions" instead of "children"
Use set_x_var / get_x_var instead of assign_x_var / lookup_x_var
Record the example json to evaluate

Really, just to reduce later.

But a better solution would be to have the haxe tests
actually call out to the server or a binary for this info
that way we make sure they stay in sync.