Set prototype methods to instance
This is screwing up HTML generation for uppercase constants

See https://github.com/atom/biscotto/issues/39 for more information.
Chop off `code` property in example

Resolves https://github.com/atom/biscotto/issues/37
Don't render links that don't exist

Two separate fixes:

* Don’t render inherited classes that don’t exist
* Don’t render methods within classes that don’t exist

Closes https://github.com/atom/biscotto/issues/42
Merge pull request #54 from atom/html-generation-bugs

Fix several HTML generation bugs