Implemented fisheye camera triangulation.

swig/spt.i

@@ -64,6 +64,7 @@ def convert_cameras(cameras):
         camera.T = cam["T"]
         camera.width = cam["width"]
         camera.height = cam["height"]
+        camera.type = cam.get("type", "pinhole")
         c_cameras.append(camera)
     return c_cameras
 %}