I made a spline guide

it's not complete by any means, I just wanted to have a guide for the splines I've implemented in my spline tool c:

there *is* a C2 interpolating spline I've yet to implement - the cubic natural spline, but as a tradeoff in that one you lose local control, so it's a lil wonky

@acegikmo Would i as your spline-tool-user have to go through this chart to decide which type to use?
@tjheuvel if you want! I'll make a prettier guide once the actual plugin is done :)