Updating the Prim Ref page

[Vincent Messenet]

I copied all content from the former primref page and added the missing prims from the p folder. Suggestions? Corrections? have your say:

https://wiki.ldraw.org/wiki/Primitives_Reference

w.


PS. We have to decide on the thumb for the helix.

Thanks Willy for your huge contribution in building the new prims reference page, I really like it!