Update nokogiri to 1.6.2.1.
Merge pull request #360 from opscode/update_nokogiri

Update nokogiri to 1.6.2.1.
Index accounts by UID and Provider
Order cookbook versions semantically instead of by id
add vendor stylesheets to the asset pipeline
Merge pull request #359 from opscode/sort-versions-by-number

Sort versions by number
Merge pull request #361 from opscode/index-accounts-on-uid-and-provider

Index accounts by UID and Provider
Create a worker which refreshes OC-ID OAuth tokens

In order to refresh OC-ID OAuth tokens, we need to store the refresh
token provided by OC-ID. We also need to store the timestamp provided by
OC-ID which represents the time at which the given OAuth token will
expire. This commit adds a column to the accounts table to store the
former, and adds the code required to store both whenever a user
authenticates.
Schedule OC-ID OAuth token refreshes with Sidetiq

We're using the version on GitHub because the version published on
RubyGems has compatibility problems with Sidekiq 3.0.

We backfill Sidetiq jobs in an attempt to prevent gaps in token refresh
coverge due to deploys.

Ref: https://github.com/tobiassvn/sidetiq/issues/79
Send Sidekiq errors to Sentry
Index account OAuth expiration times
Expose the number of expired OAuth tokens through the API
Merge pull request #357 from opscode/refresh-tokens

Refresh OAuth tokens
Implement Dashboard UI

This implements the Dashboard UI for logged in users.
The dashboard lists when new releases of followed cookbooks
get pushed and the users cookbooks and cookbooks they
contribute to.
Merge pull request #353 from opscode/dashboard-ui

Build out dashboard
Scope simple cookbook listing styles

The styles that apply to the simple cookbook listings need to be scoped
to other .simple_cookbook class so it doesn't effect the regular cookbook
listing.
Merge pull request #363 from opscode/fix-select2-image

Add vendor stylesheets to the asset pipeline
Merge pull request #364 from opscode/scope-simple-cookbook

Scope simple cookbook listing styles
add the other pg extension to the README
Merge pull request #367 from opscode/more-docs-around-extensions

add the other pg extension to the README