Use error.stack instead of error for console log

Chrome/V8 give you the error name, message and callstack at that
property, where toString() gives you [object NavigatorUserMediaError]

FREEBIE

js/views/recorder_view.js

@@ -70,7 +70,7 @@
             this.recorder.startRecording();
         },
         onError: function(error) {
-            console.log(error);
+            console.log(error.stack);
             this.close();
         }
     });