Merge pull request #27 from dsjellz/master

Resolve Issue 26, Exception when using getBounces
Unset empty `spam_count` object key when NULL.

`ContactTrackingService::getSummary()` uses `TrackingSummary` as well, but contacts don't have `spam_count`.
Merge pull request #28 from zackkatz/patch-1

Unset empty `spam_count` object key when NULL.
Adding MyLibrary functionality