Redesign of plugin interface

[chb-ppi]

The plugin interface is not consistently. It is mostly designed around the actual use-case. Futhermore it is in my point of view not save to add a additional plugin. The plugins are hardcoded and have to be in a specific order.

There had to be a standartizied Plugin Interface and a not order dependend possibility to add new plugins.

[chb-ppi]

The interface of a plugin should be a class containing the important aspects for which types the plugin would work. An example for this would be a class BeanConvesion.
This class should contains at least the declared type of a oject and the "true" type.