Minor fixes to make code more railsy

- Add html file extension to views
- Remove unnecessary layout definition (it's picked up automatically)
Merge pull request #161 from alphagov/railsify-code

Minor fixes to make code more railsy
Switch to govuk_admin_template
Fixes to anonyous feedback result table
Remove obsolete bootstrap2 span classes
Goodbye wells

Since there's no sidepanel any more, wells aren't necessary
Move request description from view to model
Landing page improvements

Because the new request dropdown doesn't work without JS, it should be hidden
when JS is disabled. To further support the non-JS case, the landing page
displays the list of possible requests.