Update Runnymede's cobrand with their new design.

Fixes #37.
Update installation instructions for Debian Wheezy
Add required more required packages to the list
Ignore vagrant-related files
Update URLs for template fragments
Tidy up display of lists on homepage
More spacing/layout tweaks to page elements
Use new link colour for tabs on petitions list
Remove old template fragment URLs
Allow cobrands control over width of petition actions block
Ensure Surrey index page blocks use proper classes
Surrey petitions lists are styled as tabs
Correctly display and order Surrey prev/next buttons
Separate petitions list tabs with a cobrandable value
Make Surrey petitions lists tabs more responsive
Allow petition detail DOM classes to be overridden

Surrey CC's templates require the use of Bootstrap classes to
control element widths and ensure responsiveness.
Update to latest Surrey template URLs
Update installation instructions to be more helpful
Update Surrey template URLs
Allow cobrands to style 'previous' submit button