[PATCH] Easier extensible AbstractXinhaPlugin

This is a patch that adds the "public" access modifier to the inner class org.hippoecm.frontend.plugins.xinha.AbstractXinhaPlugin.Configuration in order to enable easy extension of this class. The current default access modifier prevents developers from being able to extend AbstractXinhaPlugin to add a behavior for a custom picker.

See http://hippo.2275632.n2.nabble.com/Extending-XinhaNodePlugin-td6061953.html for more info.