[Drawkit] Changing user info?

[Graham Cox]

Hi all,

I'm considering a change to the userInfo property of DKDrawableObject,  
making it explicitly a mutable dictionary rather than an anonymous id.  
Minor parts of DK are elsewhere currently assuming it's a dictionary.

Is anyone using this property to store anything other than a  
dictionary? Is anyone accessing the contents of the user info  
dictionary directly? If so make your case...

Note that stuff that builds on the user info property such as metadata  
won't be affected.

--Graham