Put back accidentally removed line from setup.py header
website: Add autologin and nick selection to WebChat link
doc: Fix broken logo images in spec.html extra doc

Logo images were not copied, because they are not referenced from
.rst files. And even if they would, they'd end up in _images/
instead of images/

--HG--
rename : doc/images/logo-acl-medium.png => doc/html_extra/images/logo-acl-medium.png
rename : doc/images/logo-codesourcery-medium.png => doc/html_extra/images/logo-codesourcery-medium.png
rename : doc/images/logo-software-carpentry-standard.png => doc/html_extra/images/logo-software-carpentry-standard.png
doc: Fix broken logo images in original_overview.html extra doc

--HG--
rename : doc/images/edit.png => doc/html_extra/images/edit.png
rename : doc/images/hyperdb.png => doc/html_extra/images/hyperdb.png
rename : doc/images/roundup.png => doc/html_extra/images/roundup.png