Merge pull request #7 from dustinmoorman/experimental

Experimental merged to master.
Added a check in the Customer::getCustomerDataById() method that makes sure the Customer::$PDO component is a PDO prior to usage. This is necessary since Customer::$PDO can be set at any time, and not required in the constructor.
Merge remote-tracking branch 'origin/master'
Merge pull request #8 from dustinmoorman/master

Merged experimental branch from master branch.