Cache module info, including current path, on app load.
Added specific types of TextField, and support for a 'multiline' attribute
Added a self._app property for http controllers which references the running RevApp.
Also renamed render_template back to _render_template so it doesn't get set up as an endpoint.
Added custom handler for static files (in debug server mode). Uses the module load order to determine which module's static file should take precedence.
Renamed rev_app model modules to conform with PEP8
Made a start on the RevApp frontend, based on AngularJS and angular-ui-bootstrap.
Implemented bootstrap navbar. Dependencies committed directly for now but should probably be installed in a slightly more clever way in a future version.