Set up admin emailing for errors on the DotCloud server
API key auth optimization.

- Join with User table when verifying api key so that only one retrieval query is necessary
- Do not log the IP-address and access time when a request is authenticated with API key; cuts down on a write query for every API-key related request
Fix: user can update a dataset with the manager

- Update the requests library version to 1.0.0 or greater
- Update the DataSetFormMixin.update method to use json as a method instead of a property on a response object
Fix: API key optimization

- Use select related on the model manager instead of the instance returned from the get method (model instances don't have a select_related method; it must be called before the query is run)