Foolscap endpoints code review

[David Stainton]

Dear Warner,

I have without much trouble broken out the Foolscap client side
endpoint code into it's own branch:

https://github.com/david415/foolscap/tree/endpoint_client1

All Tahoe-LAFS and Foolscap unit tests pass.
Is this OK? Is this commit a small enough unit of code?

This is definitely not the ideal case you mentioned where there are 3
phases of introducing a change... I believe that would take a lot more
effort... but I'd be willing to do it if that is the only way to get
this code merged.


Sincerely,

David