add support for weaving classes in a jar besides that classes on the project

[GoogleCodeExporter]

What steps will reproduce the problem?
1. My application uses a JAR that has some classes annotated with 
MappedSuperclass. Those classes are supposed to be weaved as well for the 
application to work correctly.
2. Execute weaving using eclipselink-staticweave-maven-plugin
3. Execute the application

What is the expected output? What do you see instead?

The outcome are errors like "java.lang.NoSuchMethodError: 
my.clazz.name._persistence_checkFetchedForSet(Ljava/lang/String;)V". 

It would be interesting if there were a configuration to let the project 
specify more then one source for the classes and that JARs could also be used 
as source.

Original issue reported on code.google.com by [email protected] on 5 Apr 2012 at 4:48