Move `cutie` as a specification instead of implementation.

`cutie` no longer contains any code! This is because `cutie` now uses streams to do all the dirty work and simply provides info about what streams must do to adhere to the `cutie` protocol. Necessary information is now in the README.

This version bumps to `2.0.0`.

Ignore `npm-debug.log`.
Merge pull request #2 from izaakschroeder/api-only

Move `cutie` as a specification instead of implementation.