restructure basic imports: polymer.html is now the *standard* import which includes the data-modeling, polymer-core.html is now the *lightweight* import with no data-binding support
add features
have Base set/clear isAttached flag in attachedCallback/detachedCallback
implement _sortPropertyEffects more carefully to fix improper sort on ios
add `translate3d(node, x, y, z)` method to utils.html
move data features to data-features/, move layout.html to src/
add module.html, focus feature, various tweaking
experimental strict refactor of template and bind subsystems
Merge pull request #1012 from Polymer/0.8-miceplay

0.8 miceplay