enforce routes receive json format
add hook to convert boolean parameters for all routes
add ParamsHelpers module, coerce_boolean_strings method
use ParamsHelper to preprocess boolean params
stubs for lair/helperscontroller
implement lair/helperscontroller::index
add test for inactive flags
Merge pull request #13 from cs198/lair-helpers-index

Lair helpers index
Merge pull request #12 from cs198/controller-refinements

Controller refinements