implementing capturing of displayname in formstack take 1
different processing for hidden fields that accepts username and uses label
Merge branch 'master' of github.com:guardian/frontend into id-add-username-formstack

* 'master' of github.com:guardian/frontend: (53 commits)
  Removed stub pa api, will add back when fb team disbands
  Fix broken build
  Fix broken build
  Refactor ad targeting
  Add height adjustment after submit
  Refactor ad segment matching
  Include config as a dependency
  Refactor iteration through array
  adding c- to colour variable
  code review changes
  Make ad-targeting switches temporary
  Small changes to public profile page from Julia
  Gzip the byte array before caching it.
  Only show table dropdown if it exists
  Removed debuggin code
  NL@EOF
  Removed name as it doesn't have hashcode from dropdown
  Accessibility added to dropdowns
  Update 2014-04-07.md
  Incident report 20140407 updates
  ...
Merge pull request #3885 from guardian/id-add-username-formstack

Add username to formstack hidden fields