Spec stub for showing pull requests for a student

Removed the instructors namespace. YAGNI for now.
  Refactored specs and controllers where necessary
Merge branch 'master' into show_pull_requests_for_logged_in_instructor
Move the controllers out of instructors folder...
Beginning to work on the StudentsController#pull_requests
Fixing some whitespace issues
Rename pull_requests to submissions to make this more general
Now actually mocking github omniauth correctly
Abstract out the omniauth hash creation
The object returned after creating a student should be a Student
Make sure we are not creating a user when we should return an existing
Beginning work on actually displaying pull requests

Add Octokit and OctokitHelper for RSpec
Mocking Octokit.pull_requests to not have to actually issue reqeusts to
github. This will be used in request specs and anywhere else it may be
necessary.

Currently only checking for existence of *all* pull requests on page.
Replace ERB with HAML ftw.
Basic functionality for showing pulls with Octokit

Needless to say, this will throw auth errors
PRs now being pulled for a specific repo

Also, adding some filters to the mock
Fixes for specs broken due to new functionality
Fix to Guardfile - remove dupe

Also update devise and arel
All pull requests for GA org repo
Now displaying all pull requests for all wdi-sf-jan-2014 org repos
Syntax fix
OctokitWrapper is a singleton that inits octokit

Now using authed Octokit::Client. No longer having issues with rate
limits.
Remove all erb files