don't try to keep the whole entry in memory

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1618380 13f79535-47bb-0310-9956-ffa450edef68
add a bunch of toString methods

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/compress/trunk@1618382 13f79535-47bb-0310-9956-ffa450edef68