Add Hawk middleware with PyHawk

This doesn't include responses and I am about to try a new
approach with mohawk.
I wanted to keep it around in case I wanted to reference it.
Hawk request/response handling w/ mohawk
Merge pull request #7 from kumar303/hawk-mw

Hawk middleware
turn on some mohawk logging in cmd
bumped mohawk for mac calc bugfix
Add __init__.py to sites directory.
Pass request data via META
Bump mohawk for response handling bug fixes
Update DOMAIN for stage.
Merge pull request #9 from jasonthomas/master

Update DOMAIN for stage.
Update stage settings.