Initial import.

git-svn-id: https://svn.apache.org/repos/asf/uima/addons/trunk@1627160 13f79535-47bb-0310-9956-ffa450edef68
[UIMA-4020] create the uimaj-json addon project to hold the JSON serialization addon for uimaj sdk, and have the dependency on Jackson-core json support

git-svn-id: https://svn.apache.org/repos/asf/uima/addons/trunk@1627162 13f79535-47bb-0310-9956-ffa450edef68