Getting closer to fully PHP5 OO. A lot of code converted from PERL style to real PHP.

* Functional Changes
    * HTTPBase is now an abstract class.
    * Added ```HTTPBase::__get``` and ```HTTPBase::__set```
    * Converted values of 0 and 1 to true and false where applicable.
    * API_VERSION is now a class constant of CreditCardFraudDetection and accessed by HTTPBase via ```static::API_VERSION```.

* Non-functional Changes
    * Code cleaned up to follow Zend Framework's coding
      standard (http://framework.zend.com/manual/1.12/en/coding-standard.html).
    * A lot of comment's formatting and grammar cleaned up.
    * Replaced PERL terminology with PHP. i.e. hash vs array