One-way data binding for Polymer templates

New features

• PolymerTemplate now supports a server-side model. Values from the model can be used in regular one-way [[binding]] definitions in the template.
  • Advanced features such as sub items, lists and two-way bindings are still missing.
• Existing client-side polymer event handlers are now run even if there's a server-side @EventHandler with the same name.

Fixes

• Setting innerHTML of an element explicitly detaches all children.
• Setting outerHTML of an element explicitly forbidden.
• Requests for favicon.ico are not handled by Router.
• Picked fixes from Framework v7 and v8.

Demos

• There's a README.md.
• Polymer minesweeper has been updated to use PolymerTemplate instead of only using low-level Element features. (Still only works in Chrome.)

Tutorials

• New Hello World tutorial for Polymer templates.
• New tutorial about using <slot> in Polymer templates
• New tutorial about @EventHandler and @EventData in Polymer templates.

All changes

https://github.com/vaadin/hummingbird/milestone/23?closed=1