removed redundant block, announce release instead

git-svn-id: https://svn.apache.org/repos/asf/struts/site@1521096 13f79535-47bb-0310-9956-ffa450edef68
call releases page downloads, renamed first steps to documentation

git-svn-id: https://svn.apache.org/repos/asf/struts/site@1521097 13f79535-47bb-0310-9956-ffa450edef68