Dramatically Cut Back on the Scope of the Language

Remake has ballooned along the way from 0.1.0 to 0.2.0. Some of the features that I've added are worthwhile, but taken as a whole they make the language unwieldy and way bigger than it should be.

I propose to make the next release a much more incremental change that just adds the following two features:

- [ ] functions (both named and unnamed)
- [ ] pattern matching (in function arguments)

Other features might be added back in future releases, but for now we will cut them.