Add disadis to curate infrastructure

* Uses the ndlib/disadis code for a fedora download proxy
* Deploy via puppet class to application server machines
* Add nginx location /download-content/ for internal redirects

Addresses tickets DLTP-195, DLTP-196.
Create FAQ's Page That Completes Link Between Help Button and Tutorials

* Add final link to FAQ page.

This commit closes dltp-220#
Merge pull request #150 from ndlib/dltp-220

Create FAQ's Page That Completes Link Between Help Button and Tutorials
Merge pull request #149 from ndlib/disadis-deploy

Add disadis to curate infrastructure
Updating the Curate gem

2014-10-21: Help Request Information should be included [Dan Wolfe]

$ ./script/update-curate-gem
Help Request Information should be included

* This update goes along with a pull request of the same name on curate
  repository.
* This will also need the curate version bumped.

dltp-255#

Delete help_request.rb file because it is no longer needed.
Merge pull request #147 from ndlib/dltp-255

Help Request Information should be included
Updating the Curate gem

2014-10-22: Make the index view to be consistent for all work types [Rajesh
Balekai]

2014-10-22: typo in FAQs [Rajesh Balekai]

$ ./script/update-curate-gem
Bumping build identifier to "v2014.25"
Updating the Curate gem

2014-10-23: Change Description field to single value and text area [Rajesh
Balekai]

$ ./script/update-curate-gem
Updating the Curate gem

2014-10-23: Index date_created field as text and use for display [Rajesh
Balekai]

$ ./script/update-curate-gem
Placeholder for home page

Make brand bar typography mobile-first

Minor adjustment to footer alignment

Bring in title bar

Adding responsive logo

Search bar alignment

Adjusting site action placement

Updating header theme

Wrapping up header styles

Setting custom layout for home page

Fixing grid behavior; adding hero images

First pass at "more information" navigation

Switch division back to the libraries

Remove Block Font; it was unused

Adjust "Beta" ribbon placement

Adjusting class naming conventions

Embellishing the home page

Placholder content on home page

Adding site actions to home page

Refining site-tagline line height

Replace SVG angles with divs

Adjusting column padding

Fix angled column separators on mobile

Adjusting beta badge behavior on small screens

Additional homepage adjustments

Refining logo scaling and spacing

Refining header on mobile
Refining initial design based on feedback

Move homepage actions to a toolbar

Make the homepage call-to-action sticky

Adding placeholder questions to features

Keep more-information on top

Adding a placeholder quote in an image overlay

Improving element spacing on the home page

New logo

Ditch bootstrap grid for title bar

Adding call-to-action buttons on the homepage

Keep the ribbon from covering the help button

Adjust homepage title

Fixing typos