#138. Changed _drupalgap_entity_page_view_container() to _drupalgap_entity_page_container(), _drupalgap_entity_page_view_container_id() to _drupalgap_entity_page_container_id() and _drupalgap_entity_page_view_container_inject() to _drupalgap_entity_page_container_inject() and they all now work with a 'mode' (e.g. view, edit). Added entity_page_edit() and entity_page_edit_pageshow(). Replaced node/%/edit page_callback to use entity_page_edit() instead of drupalgap_get_form(), and added a pageshow to use and entity_page_edit_pageshow().