[uicfg] uicfg.py moves from web/ to web/views/ (prepares #2406609) We are about to make uicfg selectable. Registrable / selectable views and helpers live in web/views. Hence the move. Backward compat is put in place. However CubicWeb imports of uicfg are updated to the new location.

bgcolor = '#000000'
stylesheets = ['%s/cubicweb.css' % datadir_url]
logo = '%s/logo.png' % datadir_url
lazy = lazystr('%(bgcolor)s')