Refactored all controllers to use .set_* method for @local variables use commonly from params[:id].
Added Raid model, controller, initial views.
Added Zone model, controller, and views (closes #32).
Added application_helper.records? and .render_no_records methods to assist views with rendering when no collection data exists.
Added validations for Participation model.
Added Participation model tests.
Added Raid model tests.