Fix redirected link to OMERO features list page
Redirect Matplotlib URL
Fix redirected Github source code links
Fix miscellaneous redirected links
Fix redirected links to OME products downloads pages
Remove unused feature_plone extlink
Remove doi extlink and use jcb link for clients overview page
Restoring util scripts to user docs
Additional fixes suggested by Simon
Merge pull request #257 from sbesson/redirected_links

Redirected links
Merge pull request #260 from hflynn/user_scripts

Restoring util scripts to user docs