http://www.gossamer-threads.com/lists/lucene/java-dev/47895
http://www.gossamer-threads.com/lists/lucene/java-dev/47895

Added javadocs about when to call optimize() method.

git-svn-id: 4c5078813df38efa56971a28e09a55254294f104@527946 13f79535-47bb-0310-9956-ffa450edef68

tokee/lucene,tokee/lucene,tokee/lucene,tokee/lucene