Support Patterns without Local Proxies

[mmccool]

All the "common patterns" assume a local proxy, i.e. they require a service running on a gateway. At least it looks that way... unless the local proxy is actually combined with the device.

Can there be a pattern where the device "registers" itself directly with a cloud service/remote proxy? In practice I think this pattern is quite common.

[mmccool]

To clarify, when I did the "register with a remote proxy" implementation, I actually set up a reverse tunnel to access the remote proxy; which in fact is a kind of local proxy. So maybe we just need to explain different ways to implement "local proxies".

[mmccool]

Part of what I added to PR #176 addresses most of this, eg. when a local Servient acts as a client and connects to an external remote Servient to set up a tunnel.
Doing without a local proxy at all would require every device to support a tunneling protocol which is maybe NOT a good thing... more of an anti-pattern, really.

[mlagally]

See PR: #319