Add .pagination component
Replace .nav-pagination on Tags with .pagination
Remove redundant _nav_pagination component
Add underline to pagination arrow icons
Add .content-grid component

Also bumps font-awesome bower package.
Add file display to content-grid
Remove superflous empty line
add helper to return css classify files
Correct typos
First pass of files UI integration
Format images within content-grid
Formats uploaded image within File Edit screen
Formats Upload File button
Tweak content-grid file item formatting
Alter h1 formatting

Also change h2 to h1, where necessary
Fix cucumber tests on tags admin

Now uses the .t-  prefix
adapt file admin test suite to front-end modifications
add missing translation to delete files
add missing translation to confirm deletion of files
refactor files admin view