User Role Access Fixes

- User role cannot view index and show
- Footer nag Credit links to user's credit
- Footer bar only visible when logged-in
Deleted Status Entity

Status views, controller, helper, model..etc
Credito: campos obligatorios & Flash Messages Fix

- Al crear un crédito los siguientes campos son obligatorios: comercio,
usuario y monto del crédito.
Credit Type & Assigned_by changes

- Removed credit type field from form
- Created credit.assigned_by field, added to create controller.
Added and Removed User-Merchant Admin

Wanted to use the User Model to grant accces to the merchants. Did not
like it because it messes up with sessions.

Will try creating another Model: MerchantUser