Added a parameters class for properties configuration.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1458519 13f79535-47bb-0310-9956-ffa450edef68
Added a fluent API for setting parameters of a builder for PropertiesConfiguration objects.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/configuration/trunk@1458520 13f79535-47bb-0310-9956-ffa450edef68