Add basic Tika connector.  Part of CONNECTORS-954.

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/trunk@1603648 13f79535-47bb-0310-9956-ffa450edef68
Create a new branch to work on CONNECTORS-954

git-svn-id: https://svn.apache.org/repos/asf/manifoldcf/branches/CONNECTORS-954@1603651 13f79535-47bb-0310-9956-ffa450edef68