Post-release updates to release notes and download page.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1596032 13f79535-47bb-0310-9956-ffa450edef68
Reflect pom updates from the latest release.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1596034 13f79535-47bb-0310-9956-ffa450edef68
Use the test-specific hull generator instead of a fixed one.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1596040 13f79535-47bb-0310-9956-ffa450edef68