Update JSR 269 to current draft, changes include:

* SourceVersion has methods to detect both simple names (e.g. "foo") and qualified names (e.g. "foo.bar")

* The package docs for the modeling classes state clients should not expect to be able to modify the collections returned by the methods in the hierarchies.

* The utility visitor classes have been restructured. Generally, the revised forms are more flexible and should allow for more compact code in subclasses. All the methods in the kind-visitors obey the usual method naming conventions (no underscores).

* The most fundamental change is having the methods in the modeling and processing interface hierarchies which return collections (Lists and Sets) use wildcards; e.g. List<? extends Element> instead of List<Element>.