UIMA-3806 Explain DUCC demo

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1597867 13f79535-47bb-0310-9956-ffa450edef68
UIMA-3806 Explain DUCC demo

git-svn-id: https://svn.apache.org/repos/asf/uima/sandbox/uima-ducc/trunk@1597869 13f79535-47bb-0310-9956-ffa450edef68