Update DB.SQL

New changes:
1) for 'users' table, change 'profile_pic' type to' VARCHAR(30)'
2) for 'items' table, two columns added: 
        'ALTER TABLE items ADD price DECIMAL(10,2) NOT NULL,'
        'ALTER TABLE items ADD item_pic VARCHAR(30) NULL,'
3) A temporary folder was created to store images ('tmp' folder added to UTEP server)