Add new switch color options for 0.101.x

[TheZoker]

Before (with 0.101.0b0):

After:

[pho3nixf1re]

Please attach some screenshots to the PR as examples. Bonus points if you could submit updated screenshots for the README.

[TheZoker]

I added the pictures. Actually nothing changes, there was just a change in parameter names:
home-assistant/frontend#3683

We can also remove the old ones:
https://github.com/home-assistant/home-assistant-polymer/pull/4017/files

[maartenpaauw]

Thank you for submitting a pull request! About the README screenshots; I've created a little script which will make them automatically. I can make them this weekend.

About removing the old variables. If you want you can create a separated PR.

[maartenpaauw]

Screenshot tool: https://github.com/maartenpaauw/tiny-scripts/tree/master/theme-screenshot

I guess I have to add a README and default home assistant configuration soon! 😄