+ Thing#compare test
+ Label#clone tests
(- meta fix) Excluding additional.coffee from test-coverage
+ note re: cloning executions' locals
(re new api) Getting rid of @locals in favour of a method

Now, we'll go diving into the metadata to find `locals`, every time. This allows it to be overriden
from userspace. I'll probably revert this later; I believe a `set_locals` in userspace might be a better idea. We'll
see.

Herein we also more thoroughly test all of the `Execution`-cloning methods.

Squashes: 20743..4da66, 2dd2e
(- new tests) Fleshing out types' tests a bit

Squashes: 5d9ce..3bb6f
(- meta fix) Excluding additional.coffee from test-coverage
%%SYNC