added new input images

Bratislava squares.jpg https://secure.flickr.com/photos/gadl/1008389793/
Colosseo.jpg https://secure.flickr.com/photos/gadl/3897654004/
Piazza Venezia.jpg https://secure.flickr.com/photos/pedroscreamerovsky/6985948473/
Pompidou.jpg https://secure.flickr.com/photos/47611288@N00/3803410662/
Saint Louis.jpg https://secure.flickr.com/photos/gadl/401072496/