Added unit testing.
Added test.
Fixed plugin name.
Builded some tests for TargetPay.
Fixed an issue with parsing the TargetPay status string.
Adjusted get checkout order URL.
Renamed the TargetPay unit test case class.
Adjusted the URL's of the internetkassa.
Added an internetkassa unit test case.
Added two tests for the InternetKassa signature in.
Moved set calculations parameters IN and OUT to the constructor of internetkassa class.
Fixed the normal return URL.
Fixed use of $ideal to $this.
WordPress Coding Standards optimizations.
Added an SHA OUT test.
WordPress Coding Standards optimizations.
Check on GET and POST requests.
Removed test sample.
Made sha1 functions public static.
Added some tests for the Sisow gateway.