legacy: fix import in bibstat cli

* Fixes import in bibstat script.  (closes #2293)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
installation: improvement of OS X installation

* Removes `sudo` command when installing bower, less ,
  clean-css, requirejs, uglify-js.

* Fixes some `note` elements.

Signed-off-by: Konstantinos Kostis <konstantinos.kostis@cern.ch>