more release updates

git-svn-id: https://svn.apache.org/repos/asf/flex/site/trunk@1612478 13f79535-47bb-0310-9956-ffa450edef68
switch to new 3.1 installer

git-svn-id: https://svn.apache.org/repos/asf/flex/site/trunk@1612480 13f79535-47bb-0310-9956-ffa450edef68
switch to new releases

git-svn-id: https://svn.apache.org/repos/asf/flex/site/trunk@1612482 13f79535-47bb-0310-9956-ffa450edef68