Fix incorrect link to the ome_plugins JAR file
Clean obsolete MD5s and add PDF_URL for OMERO documentation

Use PDF deployed live rather than release artifacts for OMERO pdf documentation
Move ome_tools JAR to the table in the downloads page
Add user_agent during Github construction

As of today User Agent headers are mandatory for all Github API requests.
Merge pull request #7 from sbesson/user_agent

Add user_agent during Github construction
Merge pull request #5 from sbesson/ome_plugins_artifact

Fix incorrect link to the ome_plugins JAR file
Merge pull request #6 from sbesson/4.4.4_cleanup

Cleanup