<vaadin-route> DOM API

[vlukashov]

As a Polymer developer I want to define route properties declaratively using the element, and have access to all the same features that the JS API provides.

DoD:

• the 'component' property works
  -- for a single router outlet
  -- for multiple router outlets the syntax is like in component.main="x-home-view" / component.sidebar="x-home-sidebar"
• the bundle property works (including the implicit component names feature)
• the redirect property works

The common DoD applies.

[vlukashov]

Won't fix.