Add Dock Monitor and improve devtools setup

[MikeRyanDev]

This PR looks big, but doesn't have any breaking changes.

As discussed, in the future I think the Commander and Dock components could be moved into their own repos. However, I wanted to expedite releasing them in preparation for the ngrx talk tomorrow.

This PR also improves the setup process for using the devtools. Example of the minimum config required to get them working:

import {Devtools, instrumentStore} from '@ngrx/devtools';

@Component({
    selector: 'app',
    providers: [
        provideStore(reducer),
        instrumentStore()
    ],
    directives: [ Devtools ],
    template: `
        <ngrx-devtools></ngrx-devtools>
    `
})
export class App{ ... }

[robwormald]

lgtm