[Bf-python] Final Ipo/IpoCurve API revisit

[Ken Hughes]

Stephen Swaney wrote:
>
> We are all a bunch of lazy slackers!
> 
> But... in addition to being a Request For Comments, the wiki pages
> also serve design documents.  Just some brief design notes would be
> useful.  
> 
> Think of it as a way of helping future generations of bpy
> coders who might wonder "What were they thinking?".

OK, starting throwing most of the ideas on this page:

http://mediawiki.blender.org/index.php/BlenderDev/Ipo

Ken