Remove vestigal library.

I decided I want ook to operate on the PyPI/Rubygems/NPM/CPAN model, rather
than the Homebrew one:

1. Authors should be packaging their own work.
2. Authors should be able to publish new versions without anyone else's
   authorization.
3. Packaging materials should be tracked with the rest of the product, just
   like documentation-generation materials.

All of which goes to say, we won't be having installer scripts tracked inside
ook's directory; they'll go to a magical place in the ~~sky~~cloud.