Introduced get_class_from_module and def get_class_from_name.
Introduced get_class_from_module and def get_class_from_name.

Refatored get_class_from config to use get_class_from_module.

Refs: #251

piraz/firenado,piraz/firenado,candango/firenado,piraz/firenado,candango/firenado,candango/firenado