Removed obsolete digester rules file.

This was used by ConfigurationFactory which no longer exists.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1626302 13f79535-47bb-0310-9956-ffa450edef68
Changed target directory name in assembly descriptors.

For the correct version of this release, the second property defining the
version is needed.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1626303 13f79535-47bb-0310-9956-ffa450edef68
Updated build documentation.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1626304 13f79535-47bb-0310-9956-ffa450edef68