revert change for #66 as it breaks local files

Author: jrburke

text.js

@@ -287,8 +287,8 @@ define(['module'], function (module) {
                 //Do not explicitly handle errors, those should be
                 //visible via console output in the browser.
                 if (xhr.readyState === 4) {
-                    status = xhr.status;
-                    if ((status > 399 && status < 600) || status === 0) {
+                    status = xhr.status || 0;
+                    if (status > 399 && status < 600) {
                         //An http 4xx or 5xx error. Signal an error.
                         err = new Error(url + ' HTTP status: ' + status);
                         err.xhr = xhr;