Update AUTHORS file
Merge pull request #15 from rocha/carlos-claim-to-fame

Update AUTHORS file
support running integration and performance tests

* Infrastructure for running performance and integration tests
* Basic tests of both types for the MongoDB backend
* Ensure timestamps include tzinfo

Uses "make" to simplify the execution of the various commands.  We could probably integrate with manage.py or setup.py or something more sophisticated in the future if necessary.  For now I wanted to KISS.