Merge pull request #1 from larsbutler/list-calcs-views

Rough sketch of the `list calculations` views

[r=daniviga] [f=1201317]
engine/views:

Implemented a sketch of the `calc_hazard_info` view.
engine/views:

Implemented `calc_risk_info` view.
engine/tests:

Added a test case for exercising the `_calc_to_response_data` util
function.