Fix unabilty to unpublish content
Update features (max length increased from 250 to 750 characters)
Add close response and close proposal comments functionality
Update challenge feature
Automatically close comments for 'Archived' or 'Incorporated' proposals, display status summary on individual challenge page
Incorporated and Archived proposals in different colours
Fix bug in challenge status summary
Rename field in challenge content type
Make 'User need' field not required
Change "incorporated" to "incorporated in a proposal"
Merge pull request #11 from ratajczak/master

closing responses and comments on proposals