Integration of the maven-plugin-plugin for automated helpmojo-generation

Thanks to Adriano Machado, who contributed this patch!
Fixed problem with NamingStrategy (contribution from Lorenzo Nicora)

 * NamingStrategy is set explicitly on Hibernate Configuration (not
   passed by properties)
 * Added  'hibernateNamingStrategy' configuration property
Merge remote-tracking branch 'refs/remotes/duplo-je/master'

Conflicts:
	pom.xml
	src/main/java/de/juplo/plugins/hibernate4/Hbm2DdlMojo.java