Changed drupalgap_form_load() to work across all entity types. Added 'text' field support via _drupalgap_form_render_element_item().
Changed drupalgap_field_info_instances() to pull bundle-less entity types out of the instance wrapper. Changed drupalgap_field_info_instances_add_to_form() to handle the user registration form special case.
Changed user_register_form() to add user entity fields marked to appear on the user registration form. Changed user_register_form_submit() to use drupalgap_entity_build_from_form_state() now that the form is field ready.