Support for ML 8, single module execution, two way SSL and others

1. Ability to execute single xquery or java module.
2. Support for two way SSL with client certification and new HostKeyDecrypter
3. Option to handle transform failures and write errors to a file.
4. Option to run multiple URIs in a single transform for improved performance.
5. Pass custom inputs from URIs module to other modules.
   Unit test coverage
   Note:
6. Requires Marklogic xcc 8.0.* jar, which can be downloaded from https://developer.marklogic.com/products/xcc. Please note that xcc-8 is compatible with MarkLogic 5 or higher.
7. Requires java 1.6, but java 1.7 is recommended.
8. If extending corb, the code needs to be recompiled. A number of improvements have been made in this version and hopefully, extending corb is a lot easier now.