New version with Polymer 2.0

[wanghailei]

@ebidel Hi Eric, it there a plan of upgrading this great app with Polymer 2.0. This will be a wonderful learning source for Polymer 2 users. Thank you!

[ebidel]

Unfortunately, I have no plans to update it to 2.0.

[JGSolutions]

Hey @ebidel
Did you ever have intentions to finish the app?

[ebidel]

No plans at this point.

[JGSolutions]

i wish gmail can have a material UI look and feel