Fixed a typo in the test and fixed the code to make it pass. Cloudmailin doesn't pass attachments at all if there aren't any so I decided it should be an empty array in this case.
Merge pull request #37 from r38y/cloudmailin-typo

Fixed a typo in the test and fixed the code to make it pass. Cloudmailin...
Fresh hash from CloudmailinAdapter

Return a new hash with only the neccessary keys from the Cloudmailin
adapter.
Document expected adapter normalized_params
Add status badges to README