Added format=xml support
run directly with 'python PostmonServer.py' using __name__ == "__main__"
Adicionado suporte a mongoDB com auth habilitada
added xmltodict on requirements
Test for xml response
Fix XML test
Merge pull request #68 from rochacbruno/master

Suporte a XML, executar direto com python PostmonServer.py, XML testes, suporte a MongoDb com auth.