Merge pull request #638 from sbesson/rebased/dev_5_0/homebrew_4410

Document latest changes to the Homebrew OMERO formula (rebased onto dev_5_0)
Add --devel option to install the OMERO 5 via Homebrew
Updating screenshots
Listing demo before VA again
Merge pull request #644 from sbesson/omero5_homebrew_devel

Add --devel option to install the OMERO 5 via Homebrew
Adding demo server to main index new list
Merge pull request #642 from hflynn/demo-server-5

Updating Demo server availability for 5.0.x
merge dev_5_0 -D org -I include -E exclude: PR 640 (Update docs for import and logging fixes)