- NuunLog annotation behaves like a meta annotation 
- NuunConfiguration is now a plugin and it provides a getConfiguration
public api. We removed it from the kernel.
- add sanity check, if never reflections retrieve the class from the
classpath, but it can not create it like with the javaee jar 
  "java.lang.ClassFormatError: Absent Code attribute in method that is
not native or abstract in class file javax/servlet/http/HttpServlet"
 
http://www.mkyong.com/hibernate/java-lang-classformaterror-absent-code-attribute-in-method-that-is-not-native-or-abstract-in-class-file/