Commit changes from #214

This is the implementation of the applications page
by @adam-at-mobomo initially proposed in #214.  It implements
story #111.
Add legal documentation to MyUSA & link from footer

This addresses #49 and #108.  It posts the legal docs
as markdown, and then processes them into one legal.md file
using a rake task.  From there, aglio turns the markdown
into html, and puts it in /public/legal.html.

aglio part of our rails views, but we're leaving that for
another day.
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
SES and Google secrets & settings
set From: and Reply-To: for outbound mail
Add tests for revoke app

These tests are the remaining code from PR #208.
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
Test Reply-To: as well
Merge pull request #252 from 18F/feature/revoke-tests

Add tests for revoke app
Merge pull request #251 from 18F/hotfix/email-settings

Hotfix/email settings
Merge pull request #247 from 18F/feature/legal

Add legal documentation to MyUSA & link from footer