[R] use dbhelper.binary_value to process passwords and other Bytes fields (instead of dbapi_module.Binary or hardcoding buffer()). This requires (esp. in serverctl) version 1.3.1 of logilab.database. Dependencies updated.

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