respond with a 204 for OPTIONS requests
move param JSON for communicants controller spec into separate file
use rack middleware to handle CORS
use let() for params in communicart controller spec
Add circle config
Add Circle badge
Remove travis yml file
Merge pull request #108 from dlapiduz/circle

Add circle ci config
Merge pull request #105 from 18F/rack-cors

use Rack middleware for CORS support
first cut at error