ignore local gems if we choose to vendor
add a simple guard file for automatically running tests
add basic caching with rack cache
use require_relative instead of full path
add tests for various security minded http headers
update json hash with new fields for http headers
only enable local cache in development
add a default rake task pointing at test
deal with case where no cookies are present
sometimes the cookies header appears to be an array
improved positive test cases
Merge pull request #3 from alphagov/security-headers

Add tests for various security minded HTTP headers