Do not use LDAP in development and test environments
Changes to make the app's config more consistent with Rails 4
Allowing infraction types to be hidden so they can't be chosen when creating an infraction
Adding page with game rules
Increasing default points for the punishment infraction type
Strong parameters for the entire app

- Moving mass-assignable logic from models to controllers using Rails'
  strong parameters.
- Moving the logic that decides whether a field is shown in a form or
  not from the views to the controllers, using the same methods that we
  use for strong params. That way we're making it even more maintainable
  since the logic is now in one place.

Fixes Issue #45
Configuration fixes for production environment and a bug fix for the app
removing winning/losing images from top reporter chart