SOLR-312 -- adding javadoc task for solrj.  Including the javadocs in the distribution.
SOLR-312 -- adding javadoc task for solrj.  Including the javadocs in the distribution.

git-svn-id: 3b1ff1236863b4d63a22e4dae568675c2e247730@557773 13f79535-47bb-0310-9956-ffa450edef68

apache/solr,apache/solr,apache/solr,apache/solr,apache/solr