python3: Introduce py33 to tox.ini

Introduce py33 to tox.ini to make testing with
python3 easier.

Change-Id: I96d1ecd3f0069295e27127239c83afc32673ffec
Signed-off-by: Chuck Short <chuck.short@canonical.com>
api: add limit parameters to meters

Blueprint: api-limit

Change-Id: I4203973bbf5a5566a3442a467984aec59805f216
Signed-off-by: Julien Danjou <julien@danjou.info>
Merge "python3: Introduce py33 to tox.ini"
Merge "api: add limit parameters to meters"