mention only relevant web servers
sysadmin web deployment cleanup
review of web deployment section, including:

 - splitting sysadmin and developers OMERO.web deployment
 - adjusting instructions for sysadmin
 - adjusting nginx instructions for developers
updating paths
adding static url
adding timeout adjustment
removing extra level of hierarchy
removing unnecessary configuration
fixing all inline comments from sbesson
exposing production deployment as the main option
reverting client_body_temp_path as needed
adding HTTP response header to the windows section
Merge pull request #827 from aleksandra-tarkowska/nginx_doc

Nginx doc
updating screenshot
De-emphasize omero.web.application_server in unix docs

Move omero.web.application_server lower down
(Note is this relevant to IIS?)

Add paragraph explaining fastcgi-tcp vs fastcgi

Conflicts:
	omero/sysadmins/unix/install-web.txt
Merge pull request #845 from manics/rebased/develop/clarify_fastcgi

Clarify fastcgi (rebased onto develop)
Merge pull request #843 from aleksandra-tarkowska/IIS_compatibility_mode

adding HTTP response header