Java.net maven repository updates

A few more updates on the java.net maven repository:

1. JSR-250 jars and source zips are now available in the maven repository.
2. The fact that java.net only accepts HTTPS connections is a source of many troubles. So I set up a mirror of the repository at glassfishwiki.org. This is synced every hour.
3. Source jars for stax-ex, sjsxp, stax-api are also posted.
4. I've been fixing missing dependencies of the JAX-WS RI POMs. 2.1-SNAPSHOT now contains all the needed dependencies for maven users out there.

I plan to set up a mirror for maven2-repository as well.