research a better way to include custom API providers

[chelm]

Everything cannot be in master or in the same repo. We need to establish a best practice for writing providers and having them included into the code base upon a deployment of koop.

Thoughts:

use npm as a way to install a provider use configurable grunt tasks use git submodules?

[chelm]

Koop now uses "npm install ..." to install providers, then at start up it finds all the modules with the name "koop-*" and registers the routes.