Added check if binding supports retrieval in the method 'performRetrieval'
Update DeferredConverter.java

Making this class public makes it easier to extend the project with own JSF-related annotations, otherwise one should clone this class.
Update DeferredValidator.java

Making this class public makes it easier to extend the project with own JSF-related annotations, otherwise one should clone this class.
Merge pull request #120 from 0swald/master

Added check if binding supports retrieval in the method 'performRetrieva...