switch to the latest assert for test stubbing

The latest assert adds its own native stubbing API. The switches
to that. No behavior changes - just test cleanups.
Merge pull request #111 from redding/kr-assert

switch to the latest assert for test stubbing
Feature branch, modify Sanford configuration and startup logic

This is an effort to modify Sanford to work more like Deas in how
it is configured and is started. The goal is to make them similar
and also simplify some of the oddities of working with Sanford.
This will change the CLI to take a configuration file, which is
expected to define a Sanford server. The server will contain all
the configuration for the IP, port and other options. The server
will have (or be given) a router. The router will be where
services are routed. Service handlers will continue to work as
they previously did. This branch is a collection of the changes to
get the changes working as expected.
Add `Router` and `Route` for routing and running services

This adds a `Router` and `Route` class. The `Router` will replace
part of the `Host` and `HostData` logic for routing services. This
also adds a `Route` class that will be built when a service is
added to the router. This will handler building and running a
`SanfordRunner` and returning the response. This follows Deas'
implementation and is part of the effort to modify Sanford's
configuration and startup logic.
Merge pull request #109 from redding/jcr-add-router

Add `Router` and `Route` for routing and running services
Update to use the new DatTCP, rename server to server old

This updates Sanford to work with the latest DatTCP but also
renames server to server old. This is done to make room for
reworking the server without breaking sanfords full functionality.
Until we are ready to switch to the new server logic, the old
logic can continue to be function. This switches to using the
new DatTCP with leaving the server logic as unchanged as possible.
This doesn't change any functionality, just switches out to the
new DatTCP and renames the server.
wip