Updates to support the "spoof" parameter in gmetric4j.

- Updated to support the "spoof" configuration parameter.
- Updated to version 1.0.3-SNAPSHOT of gmetric4j.
- Updated .gitignore.
- Updated version to 1.0.4-SNAPSHOT.
- Updated the build to pre-process the MANIFEST.MF file to insert the
proper jar file versions.
Merge pull request #2 from johnmshields/master

Updates to support "spoof" now available in gmetric4j.