Proof of concept embedded ICE

Paired with @lordzork
First pass at attr binding in polymer.dart
Worky with the latest, unreleased Polymer.dart patches
Move polymer code into lib/polymer
Tests and placing more of ICE inside the shadow DOM
Add 2 more polymer elements to the sample page
Tests for multiple elements
Switch to scheduled_test for better async testing
Buggy (and noisy) support for multi-element
Simplify webgl example
Ensure polymer elements are updated when inserted
Changes for Dart 1.0

Better use the HTML unit test config.
Remove deprecated JS stuff

Conflicts:
	test/ice_test.dart
Update for recent Polymers
Dot git ignore the build directory
Transformer to correct Polymer's non-minification
Remove old, no longer valid polymer code
Fix lifecycle method name