New GeoShape: GeoDegeneratePath

Hi daddywri,

I propose to add new type of shape for GeoPaths that have a cutoffangle < MINIMUM_RESOLUTION. We can define it as a shape consisting of points exactly on the path.
It would be a much lighter version of GeoStandardPath and created only when the cutoff angle is between 0 and MINIMUM_RESOLUTION.

Thanks!

Ignacio