change response type to text from string
Merge pull request #24 from wday/bug-response-length

Change response type to text from string.  Thanks @wday!

Fixes:  Mysql2::Error: Data too long for column 'response' at row 1: INSERT INTO `portal_publications`
Credits can have clickable links.  [#64233824]

https://www.pivotaltracker.com/story/show/64233824