Doc web custom login page config. See #11961
Only show custom login image via url
Add custom login logo doc to Windows install-web
document new // separator in omero.fs.repo.path

reflects changes arising from fixing
http://trac.openmicroscopy.org.uk/ome/ticket/12160
adjust for permitting no root-owned directories
emphasize user ownership in bold
Merge pull request #782 from will-moore/rebased/develop/custom_web_login_11961

Custom web login 11961 (rebased onto develop)
Merge pull request #783 from mtbc/rebased/develop/template-path-ownership

document new // separator in omero.fs.repo.path (rebased from dev_5_0)
Edit on GitHub extension for sphinx
Fix edit_on_github extension
Move _ext and _templates to common/
Add .gitignore to ext/
Add option to specify edit_on_github_prefix value

Fix omero/conf.py to use 'omero' as the prefix
Fix Edit on GitHub branch and prefixes
Update index.txt

Add sentence about the new "Edit on GitHub" button
as a test of the new "Edit on GitHub" button.

Cheers,
~@joshmoore
Add missing prefixes
Merge pull request #801 from sbesson/rebased/develop/edit-button

Add Edit on Github button (rebased onto develop)
Merge pull request #802 from snoopycrimecop/patch-1

Update index.txt