release-src includes bioformats version metadata

To test:

- Run `./build.py release-src`; this will generate a zip file in `target`
- Unpack the resulting zip file outside the git tree
- Check that `components/antlib/resources/gitversion.xml` exists and that the information is correct
- Check that `components/bioformats/ant/gitversion.xml` and `components/bioformats/cpp/cmake/GitVersion.xml` exist and have correct content.  The content of this should match that in the zip produced by https://github.com/openmicroscopy/bioformats/pull/918/
- Check that all the ./build.py targets work, and that the resulting artifacts contain correct versions, including the ice suffix.
- Change into `components/bioformats`; verify that the ant and maven targets work, and that all artifacts are correct.