Port the same set of features in the ant shell script to the ant batch
file.

* Automatically find the correct ant-launcher.jar version.
* You can now run the batch file from sub directories.  ../../ant works.

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1605836 13f79535-47bb-0310-9956-ffa450edef68