Re-arrange components/files structure and Update README

[kasunben]

I am using angular/angular2-seed project for my angular 2 apps with some some file structure changes. I am making this PR with those changes and please take this PR if suitable. :)

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[kasunben]

I signed it!

[googlebot]

CLAs look good, thanks!

[kasunben]

I am closing this PR for now. I think there is more better and correct way to structuring an angular2 app, so will open another PR later with those changes.