Add ggregory.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1633842 13f79535-47bb-0310-9956-ffa450edef68
findbugs-maven-plugin 2.5.3 -> 2.5.5.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1633843 13f79535-47bb-0310-9956-ffa450edef68