Merge pull request #1 from cosm/master

License Changes
Document Location and Waypoints
Define readonly fields on Feeds
Remove kwargs from Datastream
Remove kwargs from Trigger
Don't accept kwargs when listing keys.
Make all params explicit.
Move Managers to managers.py
Add gh-pages submodule
Update gitmodules to point at public git url for gh_pages branch
Merge pull request #11 from smulube/andy_master

Pull of Dev round 3
Feeds for devices now return a readonly product_id and device_serial val

This was breaking the client as it wasn't looking for those keys; so
this commit adds these two fields into the _readonly_ fields on Feed,
with a corresponding test case.
auto_feed_url also present as read only field, so needs to be handled
Merge pull request #12 from smulube/new_fields

Feeds for devices now return a readonly product_id and device_serial val