Component Loading

[ritch]

boot() should load dependent components, make their models available for configuration, mount middleware, etc.

See here for details.

Depends on https://github.com/strongloop/loopback-example-component/issues/10

[ritch]

@bajtos - I've moved this into the sprint. LMK if this is not going to work.

[bajtos]

Well, this depends on #44, so I need to implement that first. I'll move this to sprint 56 and bring #44 to sprint 55 instead.