2015-02-07 updates

- Random little fixes | Andres Suarez
- Add backButtonTitle to Navigator | Nick Poulden
- [react-pacakger] Ignore malformed package.json | Amjad Masad
- Renamed hasMove to hasMark | Rich Seymour
- Update XMLHttpRequest.ios.js | Nick Poulden
- Warn about missing dependencies for issue #16 | Andrew McCloud

Libraries/XMLHttpRequest/XMLHttpRequest.ios.js

@@ -58,6 +58,11 @@ class XMLHttpRequest {
     return '';
   }
 
+  getResponseHeader(header: string): ?string {
+    /* Stub */
+    return '';
+  }
+
   setRequestHeader(header: string, value: any): void {
     this._headers[header] = value;
   }