admin login uses PDO
list stores uses PDO
made pdo_helper

recreates the previous mysql->insertData and updateData methods
paid offers uses PDO
list terms uses PDO
edit term uses PDO
list brand uses PDO
create brand uses PDO
fix pdo helper

0 affected rows was interpruted as failing
edit brand uses PDO
remove backticks from admin
fix logout
remove backticks from root
minor fix to pdo helper
edit store uses PDO