ScanningHibernateBundle + Issue#277

ScanningHibernateBundle for module dropwizard-hibernate that searches in given package for hibernate entities (classes annotated with @Entity) instead of giving every single one of them by hand.

Idea and instructions taken from https://groups.google.com/forum/?fromgroups#!topic/dropwizard-user/9xBhmSrw6LM

There are some simple tests showing how it works.