starting on polymer branch
moving library references to polymer
making build.dart directly executable
Reworking widgets
unused imports
Merge branch 'master' into polymer

Conflicts:
	lib/components/accordion.dart
	lib/components/carousel.dart
	lib/components/tabs.dart
	pubspec.yaml
polymer working for collapse and accordion
fixed alert
fixed links to sample images in carousel
updated build to generate index.html again

...disable full build for now
fix util
updated dependencies
style fixes
tip toeing into carousel and swap
modal working
a bit of tabs...
latest SDK
stop ignoring the web/out dir
silence build.dart -- for now
update web page files for boot.js deprecation