Pull out utility class for tests involving oauth
Move oauth_test_case into support module
Pull out class for uploaded files
Test invalid cases for file upload content type
Move file parsing / saving into UploadedFile class
Integration tests for uploading csv and excel files
Disable file upload feature tests and inclusive option

 - when we ran nosetest with --cover-inclusive it failed
   the build mysteriously
 - we now have integration level tests to replace the feature
   ones
remove pprint import
Create parser closer to where it's used
Merge pull request #150 from alphagov/check_upload_mimetypes

Check upload mimetypes
Merge branch 'master' into automate-creation-of-buckets-55989156