DERBY-6090 Package javadoc publishedapi/jdbc4/index.html

Committed patch but also merging in Rick's changes in
http://svn.apache.org/viewvc?view=revision&revision=r1458262 and
adding a paragraph as suggested by Knut.



git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/trunk@1458647 13f79535-47bb-0310-9956-ffa450edef68