Update default nginx config
Document custom OMERO.web url subdirectory
Add note about conflicting mod_fastcgi options
Fix indentation
Make apache/nginx configs into subsections, rearrange text
Remove os x specific reference, add missing :
Remove bin/omero web config "apache" / "nginx"
Reformat apache and nginx configs
Merge pull request #595 from manics/rebased/dev_4_4/web_config_docs-11723-11724

Web config docs 11723 11724 (rebased onto dev_4_4)