Start writing the CONFIGURING.md doc.

todo:

- expand on some of other .env settings
- add info to the README that points to the doc
Cookbook versions have their own show page.

Its template is more or less copied directly from cookbooks/show. If we
determine that the two should remain in near-lockstep, we can extract
partials for the job.
Order cookbook versions on a monotonic attribute
Cookbooks link to each of their published versions
JS specs are passing, and running on Travis
Merge pull request #223 from opscode/show-cookbook-versions

Link to each cookbook version from the cookbook detail page
Serve paperclip uploads with nginx
Merge pull request #242 from opscode/serve-paperclip-uploads-with-nginx

Serve paperclip uploads with nginx
Restructure CONFIGURING.md and some info to README
Add back Twitter config to .env.example.

Twitter has not yet been removed from this, but will be when oc-id gets merged
in.
Merge pull request #238 from opscode/configuration_docs

Writing the CONFIGURING.md doc.
Cookbook Show UI Integration:
- Minor restructure to page to allow for full bleed columns
- Equal height columns on show page
- Format pre and code tags for command line examples
- Format cookbook heading and sidebar content
- Underscore category names in category nav
- Add template views for kaminari pagination
- Format pagination against Foundation conventions
- Restyle breadcrumbs
- Add previous page chevron next to cookbook name
- Separate cookbook show into partials for reuse for cookbook version
  show
Merge pull request #224 from opscode/show-cookbook-ui-integration

Cookbook Show UI Integration
Add an atom feed for cookbook versions to the cookbook show page
Merge pull request #234 from opscode/cookbook-versions-atom-feed

Cookbook versions atom feed
Format cookbook listing sort by options.
More usable setup for the create account/sign in functionality.
Variable-ize the user dropdown colors.
Add active state to categroy nav.
Media query tweaks to category nav active state.