Fix egg installation problems

Using the deploy.py script as a source of versioning in setup.py, which was introduced in 0.6.0, caused problems, as deploy.py is not included in the python egg. Removing that dependency in setup.py

v0.6.0: Merge pull request #45 from Asana/doc_fix

Asana has added Custom Fields to its tasks and projects!

To read more information about Custom Fields, please head to https://asana.com/developers/documentation/getting-started/custom-fields