[W.I.P.] Curve Tools plugin

[micheus]

1) I could addressed the poor performance of Put On parametric object.

First of all, these tests most the time are done in a poor PC without a dedicated GPU (i5-650 4GB GMA HD - from 2010) - the worst case of use.

In the previous test, I was getting 9 FPS in parametric format and 20 FPS after make it a Wings3D object;
Now, these values are 35 FPS and 22 FPS, respectively.




In my i7 (from 2013), with a dedicated GPU GTX1060, all these values stays in 60 FPS all the time.

2) I think I also finally resolved an issue related to Undo/Redo.


I'm still testing it in order to try release it.