Refactor html and page serveing logic into modules (#593)

* start a HTML module

* Move to its own file. rename handle_snapshot_request to serve_snapshot_request

* Normalize methods serving data up with serve prefix, and no 'request' suffix. Move those to their own actions module

* helps to actually add stuff. move more logic in call into serve_ methods

* rename html to views. also, apparently forgot to add actions.rb

* move resources_root and share_template to views. fix some calls that were missing client_settings

* refactor to a case statement

* Pull self.current management out of the actions, and back up to call

* revert change to website