[NPANDAY-210] backwards compat for include sources

Pass the files into the main routine, so that if they are used you don't
also get a default **/*.cs as well. Also reinstate the old test source
handling. We can remove these in a 2.0.0 release.

git-svn-id: https://svn.apache.org/repos/asf/incubator/npanday/trunk@1572419 13f79535-47bb-0310-9956-ffa450edef68