current_user should be @user

On the user show view @user should be passed into policy not
current_user as we already have current_user available in authorizers.
Merge pull request #460 from opscode/ensure-user-before-policy

Ensure current user before enforcing policy
Remove duplicate Cookbook Dependency records

The migration looks a little different than a usual migration. This
approach ought to allow us to remove the data migration implementation
class -- Supermarket::Migration::RemoveDuplicateCookbookDependencies --
from the repo without affecting `rake db:migrate` which as of now Travis
still runs every time it builds the project.
Cookbook versions cannot have duplicate dependencies
Update docs badge in README

Update the URL of the docs badge to include it from inch-ci.org instead of inch-pages.github.io (the former being the successor of the Inch Pages project).

[ci skip]
Merge pull request #463 from rrrene/patch-2

Update docs badge in README
Merge pull request #461 from opscode/deduplicate-cookbook-dependencies

Deduplicate cookbook dependencies
Only extract top-level metadata and README files
Mark cookbook versions with PaxHeader READMEs for re-import