Update exoskeleton to 0.7.0

Ref #1110

New formatter on all vanilladart code

Ref #1110

Fix #808
Fix #580

Close #1202

Fix #1189

Ref #1110

Ref https://github.com/tastejs/todomvc/commit/3cbafd786a9fa13333d3affb48723e8f1b121082

Sjs/update home screenshot

Remove homepage slide animations.

Center footer credits

Add my bio to main readme

Fixes #1194

drops file size by 25% with no visual impact.

Fixes #1192

Ref #1110

Add missing platform.map file

Ref https://github.com/tastejs/todomvc/commit/935aed054725ecb26c4862fa7d0fa309b79d3140#commitcomment-10150439

Fixes #1191

Fix #1173

Ref #1110

Also replaced bower by npm.

Ref #1110

Remove link to marionette require_js

update canjs UI

This example was removed in 79c34b30

Fixes #1187

Update Marionette & Remove Deprecated Feature use

Streamline installing/running the browser tests

Marionette has marked `appRegions` as a deprecated feature because it is a
leaky abstraction for the Application to know so much about the DOM and
the structure of your actual page.
Instead of using `appRegions`, Marionette encourages you to setup a
RootLayout whose concern is setting up render targets.

In the near future we are introducing the concept of a "root" to the
application object
https://github.com/marionettejs/backbone.marionette/issues/2279

So that uses will have an idiomatic way of using this pattern. The goal
here is not to conflate the concerns of splitting up render targets
with your application, rather the goal is to give users a pattern to follow when
setting up a single or multiple application objects.

Fixes #1171
Fixes #1184