#53 Changed _drupalgap_api_get_csrf_token() to get the token every time, instead of using the previous token.
Changed drupalgap_get_form() to attach the form's arguments to form.arguments and then save the form JSON to local storage, keyed by the form id. Added drupalgap_form_id_local_storage_key(). Changed _drupalgap_form_submit() to load the form JSON from local storage.
Changed node_add_page() to use a pageshow callback to populate its item list.
#53. Tried saving sessid for CSRF validation, to no avail.