Migrate Derby website to new Apache website publication machinery

As of January 2013, the Apache website will no longer be refreshed from the /www/db.apache.org/derby directory tree on minotaur. Instead, projects will need to put their website content under subversion control and tell the Infrastructure team where that subversion repository is. Most of Derby's website is subversion controlled. However, the docs and alpha javadoc directories are not. We will need to put docs and alpha javadoc under subversion control along with the rest of the Derby website. Then we will need to file an issue, telling the Infrastructure team where our content lives. For an example of such an issue, see https://issues.apache.org/jira/browse/INFRA-5215