Menu add

Now, you have to assign the data attribute that each fiducial represents. For this , we use a special "menu fiducial" (currently assigned to fiducial with id = 12). When the menu fiducial is introduced, a menu showing attributes which can be assigned shows up. If you introduce a new fiducial now, the attribute at the top of the menu (marked red) will get assigned to the new fiducial.
Note :the library controlp5 (http://www.sojamo.de/libraries/controlP5/) needs to be installed

Also added some styling changes. he points now are translucent, so that overlapping points can be discerned from non-overlapping ones