Documentation

`localpart(d::DArray) obtains the locally-stored portion of a DArray.`

Somehow if I'm new to DArrays I don't find this helpful.
I try 
`localpart(A)`
and I get
`0-element Array{Float64,1}`

Can the doc recommend
`fetch(@spawnat 2 localpart(A))`
an an example of seeing the localpart(A)
and give a few more examples with
spawns, fetches, and remotecall_fetch ?

