Rescue MultiJson load errors
Change response to 400 on bad JSON and add test
Add spec for JSON check
Check response bodies to make sure we're testing the right thing
Add pass-through test case
Have response validator check Content-Type
Handle list endpoints with array responses in validator
Slightly more concise testing code
Allow setting of charset, etc.
Add README
Add not found response body
Note on `bin/committee-stub`
Use #reduce