Add routing support for elm application scaffold

[omarestrella]

A couple things coming with this:

• Helper for automatic link generation based on route
• Route detection based on provided parsers
• Optional onClick handler passing in case you need to trigger a side effect

The idea is to keep anything routing related for an application inside of the Routing module and reach in to grab your routes and a couple helpers.

This opens up a chance to explore a "Pages" concept to encapsulate related behaviors (views, side effects, decoders, etc)

[MattCheely]

Looks good, but I think the package.json and package-lock.json changes are unnecessary?