Twilio config & Chef secrets
Added SMS number to production.rb
Added SMS sender to development & test envs
Merge pull request #358 from 18F/feature/twilio-config

Feature/twilio config
Merge branch 'devel' into feature/logo_url

Conflicts:
	app/views/doorkeeper/applications/_form.html.erb
Responsive spacing issues; section centering

Reduced the arrows in the steps and put them near the numbers.
This is instead of the big arrows. Centered the section with
the numbers using bootstrap columns.

Made the width of the login block constrained across different
screen resolutions, and used the bootstrap center-block option
to center it on the page.

Changes requested by @dutchashell
Merge pull request #362 from 18F/hotfix/marketing-page

Responsive spacing issues; section centering
Remove unneeded <br>
Merge pull request #344 from 18F/feature/logo_url

Feature/logo url
- Removing css comments
- Adding integration test
- Changing alt tag
Merge branch 'devel' of github.com:18F/myusa-server into feature/mail-branding