Adding a provider page and menu
* Add categories to html search bar
* Require provider handler and object classes
* Fetch provider code objects from registry
* Add function to generate the provider list
* Fetch providers from registry in monkey patches
* Add provider templates
* Add provider code object
* Add provider handler
* Add erb file to populate the provider list
* Don't emit type information for providers in html
* Add tests for provider handler
Refactor heredoc:
* Remove heredoc annotations
* Move heredoc functions into a heredoc helper
* Add heredoc helper class
Ian Kronquist