Updated doap file for 1.9.1 release.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/trunk@1557450 13f79535-47bb-0310-9956-ffa450edef68
Added section for next release in changes.xml.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/beanutils/trunk@1557451 13f79535-47bb-0310-9956-ffa450edef68