fix css img selector affecting image width
Merge pull request #283 from hmslincs/css_fix_image_width

fix css img selector affecting image width
restrict access to attached files for restricted entities #287
fix log message bug
Merge pull request #288 from hmslincs/attached_file_restriction

Attached file restriction
added omero downtime note
Merge pull request #290 from jmuhlich/master

omero downtime note
core changes for #284; add cell batch