add ozwillo background
serve static copies of css files
serve static copies of logo
move images to a subdirectory
redo footer according to new model
adapt header to have login or logout links according to user status
add header strings translations
hardcode user login url to facilitate oidc debug
add translations of URLs themselves
update translations from menusets (+ script to automatically do it)
add i18n infrastructure
style: use ozwillo header and footer
misc: ignore egg-info directory
misc: ignore *.pyc
initial commit