Add inference of missing coordinates from Nuts4Nuts

This code add uses Nuts4Nuts:
http://nuts4nutsrecon.spaziodati.eu/

to infer coordinates from Wikipedia articles which are missing the coordinates.

See a preview of the result here:
http://img18.imageshack.us/img18/3734/igzv.png
(coordinates inferred with n4n have a blu icon)

The file with the list of articles and coordinates can be generated running:
`python nuts4nuts_infer.py`
currently a call to [spaziodati.eu](http://nuts4nutsrecon.spaziodati.eu/) and one to [geonames](http://www.geonames.org) is made to get the name of the NUT2 (administrative division corresponding to italian "Comune") and the coordinates.

The new webpages can be generated with:
`launch_script.py -n -w`

Nuts4Nuts currently work only for Italian Wikipedia articles and places in Italy, also since machine learning techniques are used its accuracy (~ 70%) has to be considered.