if the ref_point not found, shows at least an error refs #303

fixed a bug introduced in 7096d2f and preventing propper circles displaying

panorama.php

again, a lat/lon inverted

Refacto of Tiles handling and simplified a bit file naming for tiles/params.
By the way, fixes #297

THIS COMMIT BREAKS FILE LAYOUT AND REQUIRES MIGRATION (SEE BELLOW).

To migrate data :

cd tiles
find . '*.jpg' -exec rename 's/[^\/]*_(([0-9]{3}_){2}([0-9]{3}))/$1/' {} \;...

Marc patch to handle touch events

Can add a panorama from the map.

now displays the circles with the same color as on the pano (sortof...)

can set the title of the panorama from the form

PREFIXXX

adds and delete ref_points from js interface