Remove "Download from OMERO" from the plugin menu

See ticket #10770.
Merge pull request #643 from melissalinkert/testing-sandbox

Data test updates
Merge pull request #686 from melissalinkert/rebased/develop/cellworx-missing-tiff

CellWorx: do not assume that the first well/field file exists (rebased onto develop)
merge develop -D org -I include -E exclude: PR 528 (Tile performance improvements for VMS and NDPI)
merge develop -D org -I include -E exclude: PR 635 (Use jgit-buildnumber to set version information in Maven)
merge develop -D org -I include -E exclude: PR 644 (Add support for writing ModuloAlong* annotations)
merge develop -D org -I include -E exclude: PR 689 (Initial C++ implementation)
merge develop -D org -I include -E exclude: PR 702 (Upgrade SLF4J to 1.7.2 (rebased onto develop))
merge develop -D org -I include -E exclude: PR 706 (Remove "Download from OMERO" from the plugin menu)