[Bf-python] integrating lib iter types

[Joe Eagar]

Campbell Barton wrote:
> Thinking this over, looks like its too messy to mix in with the 
> current code then I think we should define a new "Blender" - so we can 
> do a "Blender_Future" module and just maintain the existing API..
>
> Moving to a new API is fine, but at some point you either end up with 
> a lot of duplicate functionality or have to start removing old 
> functions...
>
> It seems like it will be less trouble to start with a new module.. 
> then we can experement more and not worry about breaking the existing 
> stuff.
I think this is a good idea.  Especially it's annoying having all those 
get***/set** functions when we're moving away from them.

Joe