Changed 3 things - read description

1. editCustomer postal code box now supports 7 characters
2. newCustForm postal code box now supports 7 characters
3. Database table: 'Users' - Column: 'Postal_Code' is now varchar(7) to
facilitate changes in 1 and 2
4. editCustomer and newCustForm now have titles for each input box due
to the placeholder no longer being visible after clicking on the input
box.

Changes made above were done due to observing how Brandon uses the our
web application. I noticed he prefers to enter postal code as ### ###
rather than ######.

Feel free to edit how the form looks - CSS is not my forte :(