Tons of changes and fixes! 

* Changed to bundler from jewler
* Added new wsdl to tests
* Fixed failing test for find_customer ( now find_customer_entity)
* Changed to Ruby 1.9 +
* Removed !order method ( no longer needed ) 
* Updated WSDL end point
* Added option to disable HTTPI logging
* Using new billwise API
* Updated constructor, wsdlUrl should have been wsdl_url
* Added more awesome 
* Added exception handling on a soapFault ( Adam Kalsey https://github.com/jsgoecke/billwise4r/pull/1 )