Write gray-crawler to a socket.

[bamos]

HI @theonewolf - we've modified gray-crawler in our gammaray-android fork
to send BSON across the network.
This modification is easy since all of the operations
are on FILE pointers, the commit's here.

Would you be interested in adding a flag to gray-crawler
to enable both writing to a file and writing to a socket?

[theonewolf]

Two thoughts:

(1) Yes, very interested. The whole system could then operate in a streaming fashion having no need of transient persistent storage (especially when live-attaching to VMs in the cloud).

(2) I would like to get proper arg parsing into gray, I think I can work on that module and once it is in place we can add this flag in.