Add `brew tap homebrew/science` to the Homebrew installation page
Merge remote-tracking branch 'origin/develop' into rebased/develop/hdf5_tap

Conflicts:
	omero/sysadmins/unix/server-install-homebrew.txt
Merge pull request #491 from sbesson/rebased/develop/hdf5_tap

Add `brew tap homebrew/science` to the Homebrew installation page (rebased onto develop)