Wrap tiles in Shadow DOM

[tomalec]

In some kind of <juicy-tile> or just <div>.
It should

• simplify code and concept,
• make our component way less intrusive,
• we will not modify CSS of content nodes,
• 3rd party tiles may use padding/margins etc. freely.

[tomalec]

We still does not came with any idea how to do it.
List of problems we have isolated:

• No way to programmatically distribute content in JS
  • question at StackOverflow
  • W3C issue - 18429
• Lack of support for :nth-child() selectors in (native distribution) <content select> attribute W3C Bugzilla issue - 26552
• Problems with supports for attribute selectors in Chrome Chromium issue - 402471

[tomalec]

Note: check http://stackoverflow.com/questions/25564150/decorate-elements-from-content/25565699#25565699

[tomalec]

There is a hope with new Polymer 0.8.0 ShadyDOM feature
https://github.com/Polymer/polymer/blob/0.8-preview/PRIMER.md#dom-re-distribution

[tomalec]

Merged to gh-pages, will be released with new version