Allowed for client side validation of phone number and zip code to be turned off

Although the validation for phone number and zip code could be turned off in the address class by changing the require_phone? and require_zipcode? methods, these methods didn't affect the client side validation. This meant that even with validation turned off, there was no way to make these fields optional if the visitor had javascript turned on.

I haven't included a test because I couldn't find any other tests for client side validation. I'd be happy to supply one if someone could point me in the right direction.