Remove usermenu z-index

The z-index for the usermenu is no longer needed and it is causing a bug
when modals are open so this removes the z-index declaration.
The ApplicationController should always respond with HTML

The respond_to block would respond to JSON requests with the HTML text,
but this would not be rendered in the browser. We definitely want the
HTML to be rendered
Be explicit with follow button show partial render

Fixes issue where the CookbookVersion#show was 404ing.
Merge pull request #636 from opscode/template-error-qa

The ApplicationController should always respond with HTML
Merge pull request #637 from opscode/follow_partial_fix

Be explicit with follow button show partial render
Merge pull request #632 from opscode/usermenu-z-index

Remove usermenu z-index
Add resource class to cookbook version show

The resource class contains a bunch of useful styles for resource show
views without things just don't look quite right.
Remove hard_wrap option
Merge pull request #640 from opscode/cookbook-version-resource

Add resource class to cookbook version show
Merge pull request #639 from odolbeau/remove-redcarpet-option

Remove hard_wrap option
Update depedencies.

Version contraints are set on some deps in order to keep the app working as
expected.
Adjust lib/supermarket/auth spec to please rubocop
Merge pull request #641 from opscode/update_dependencies

Update dependencies
Supermarket admins can feature/unfeature cookbooks
Display featured cookbooks on directory and cookbooks index

If there are any featured cookbooks they will be displayed as a column
on the cookbooks directory and you can click View All to view all
featured cookbooks if there are more than 5.
Merge pull request #634 from opscode/feature-cookbooks

Feature cookbooks
Add copy about deprecation to the modal.
Create the deprecate_search internal end-point

Create a unique search end-point in order for Cookbook deprecation select2
search to only return eligible cookbooks for deprecation. A cookbook is elgible
for deletion if it is not deprecated and not the cookbook to be deprecated.

Notes:

- the code in the controller should be moved into an instance method on cookbook
- the deprecation parts of the CookbooksController could be broken out into
  their own controller to KISS
- the enforcement of not replacing a cookbook w/ an already deprecated cookbook
  should be enforced at the Cookbook#deprecate level as well
Handle deprecation failure at the controller level

This could be improved by:

- improving Cookbook#deprecate to use record.save! and rescue from the error
- displaying the actual error
[WIP] Enforce deprecation failure if replacement is deprecated