Commit changes from #214

This is the implementation of the applications page
by @adam-at-mobomo initially proposed in #214.  It implements
story #111.
Fix image & font references in Sass
Revert incorrect merge changes

These changes were merge conflicts and were resolved incorrectly.
Resolving these merge conflicts from feature/manage-approved-apps
to bring back correct formatting on authorizations page and
header.
Redirect "Revoke Application" to Applications page
Capistrano usage of AWS keys and gateway now optional
Knife.rb support for SSH gateways
Update documentation about deploying through gateways
Merge pull request #249 from 18F/feature/manage-approved-apps-clean

Manage Approved Apps
Set up memcached access for cache & sessions
Merge pull request #248 from 18F/hotfix/asset-urls

Fix image & font references in Sass
Merge pull request #250 from 18F/feature/deploy-via-gateway

Feature/deploy via gateway
Merge pull request #253 from 18F/feature/memcached

Set up memcached access for cache & sessions
line was commented out while debugging. uncomment it.
Merge remote-tracking branch 'origin/devel' into feature/user_audit