Package rename.
Rename Package.
Implemented the introductions example from the book.
Move Testcase to test source folder.
I tried to do something more useful, but didn't quite succeed.
The reason is that I do not know, and it might even not be possible, how
to access the advised bean by the introduction delegate.
But, technically, it works.
Added AspectJ-Dependencies to enable annotation-based aspects.
Ignore Test case.
Added Test case for @Before-Pointcut.