Blender-to-babylon exporter broken for camera data

Using latest blender 2.79 and latest exporter from Babylon team:

Camera and a cube animated 1-990 frames. On export, two things wrong occur:

• cube position array is cloned to camera, ensuring camera playback is dead center of cube

• once returned to blender, all /most keyframes sometimes deleted.

As a diagnostic task, I removed the box to only export the camera, which resulted in the camera keyframes being deleted and no file exported at all, resulting in a large diagostic failure log. It appears the exporter deletes the camera and keyframes during export, then attempts to export empty data ( list out of range )

For files see : https://github.com/BabylonJS/Exporters/issues/50