Add policy for Answers (edit/updating)
Update loose gems
Load Redis configuration from config/redis.yml
Pass config straight through to Redis object
Pull out bad_request if logic into private method on QuestionsController
Stub the reputation value on user, rather than modifying the created value
Move privilege rep definitions into a configuration file.

This is accessible through the ReputationRequirements class. (Name pending)

Also changed tests to use this new interface
Properly teardown Mocha after each scenario
Update answer features to work with the new policy.

Also stub on the policy, rather than the user reputation
Merge branch 'pundit'