Remove docs/release section from the Bio-Formats repository

The download page generation is maintained under a separate
openmicroscopy/ome-release repository so this folder is not needed anymore.
Remove docs/release from the Travis build job
Make sure that the configuration file suffix is propagated to subdirs

This prevents alternate configuration files that aren't in the top-level
directory from being ignored.
Update CI build names to point at the latest Bio-Formats jobs
Merge pull request #865 from sbesson/rebased/develop/release_cleanup

Remove docs/release section from the Bio-Formats repository (rebased onto develop)
Merge pull request #868 from melissalinkert/rebased/develop/config-fix

Make sure that the configuration file suffix is propagated to subdirs (rebased onto develop)
Merge pull request #870 from sbesson/rebased/develop/ci_latest_jobs

Update CI build names to point at the latest Bio-Formats jobs (rebased onto develop)