WIP: Add a template for loopback components

/to @ritch @bajtos 

I'm starting to add a template for loopback components. Let's use this PR to review the layout of a component and finalize the template.

To test it, see https://github.com/strongloop/generator-loopback/pull/57
I am proposing to use `1.0.0` as the initial version. It's the new default used by `npm init` too.