v0.2.0

This release includes:

• Changes process_params middleware hook name to process_endpoint and makes it similar to process_view.
• Improvements on the CommonMiddleware for better handling exceptions
• Some internal structural updates for better attachment internal variables to request object.
• Updates on the docs
• Adds more tests to increase the coverage to 90%

Full Changelog: v0.1.1...v0.2.0