So we can implement closures in Julia with a function definition that 
returns a function. And we can use macros to simplify repetitive tasks. How 
would one combine these to make a macro that defined a closure? My most 
common use case is a closure that needs an initialized variable and then 
behaves as a 1 argument function. Such as an accumulator:

https://gist.github.com/jpfairbanks/8475467#file-closure-jl

I suppose their are other|generalized ways to do this and I would like to 
know those too.

-James

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