Use local time for timestamps.

The current setup uses GMT timestamps, this fix will use the local time with a new format.
Example: ```2014-07-04 14:52:59:768```
I hope there are no tests, etc. that rely on the previous format, i.e. ```2014-07-04T11:57:04.590Z```
Haven't been able to get the timezone info using ```date-utils```. Let me know if you think it's important and I'll find a way to fix it.