Add a correct implementation of other captchatypes
|Target version:||030 - Version > 2.xxx|
At the moment some new captcha types are implemented in general over the linkcrypt.com plugin.
At the moment there is no way to use a solver with such captchas - and their implementation is improvised.
I know - stable compatibility but we could at least make a good implementation and still keep stable compatibility via the linkcrypt plugin.
Captchatypes which can't be handled by solvers at the moment:
-Slidecaptcha - http://www.minteye.com/
--> So far only used in 2 hosterplugins
---> More see code in linkcrypt plugin
-keycaptcha - https://www.keycaptcha.com/
--> Implemented in many XFS plugins but only used by some hosts
--> More see code in linkcrypt plugin
--> Well even though reCaptcha works via solvers, we should also have an own class for reCaptcha