Revert f535fd5..725c8e1

This rolls back to commit f535fd5e0859f6d2cd44f23962641733f544a03b.
User vs Admin App Layout Footer Changes
QR Code page, method and route
Added User Add/Redeem Credit Nav Bar
Added Merchant Role to User

Created Merchant field on DB
Migrated DB
Added Merchant column on Users index page
Added Merchant Field on Users edit page
Merchant Field Attribute Accesible
Merchant Environment

Updated credits and profiles controller with accurate before filter
methods
Updated Profile Show Page to include the merchant verification in order
to show add credit buttons
Default Merchant 1st part (fixed merchant id)

Hided Merchant collection from Credit Input Form if user is not Admin
Default Merchant if the user that creates the credit is a Merchant
Created users-merchant relationship 2nd part (parametrize merchant)

Created user.merchant_id field
Defined relationship on models
Updated credit controller with parametrized merchant
Updated Users View