Economy and Engineering Access Fixes

Changes the following:

 * Vending machines don't vend for suspended accounts
 * No 'Revoke payroll' spam in account database
 * Food items from the drink vendor now actually use 4x4 grid
 * Moves paperbin to a slightly lower layer so it stops clipping with pens
 * Engineering access level on ID cards will now allow the owner to at least access the Engineering main hall, dorms and washroom
 * Adds an EFTPOS device to the HoS' office in response to the Corporate Regulations
 * EFTPOS devices don't query for a PIN unless the ID's owner has set a higher security level in their account