Support for Non-Contiguous Wildcard Masks

[tyler-8]

I'd love to see support for non-contiguous wildcard masks (good post explaining them). I use them quite a bit in my day to day and being able to properly match and manage them with netaddr would be hugely useful.

[tpickle-py]

i tried attempting todo this, but my use case was a bad example of network rulesets.

where

1.0.0.1 255.0.0.255 was used and would yield a cidr16 list. maybe a generator function could be used.
where 1.0.1.1 ,1.0.2.1, 1.0.3.1...1.255.255.1 objects would exist