add license to minified polymer
add AUTHORS file
make binding tests work under Object.observe
adapt to new event.path api: now a property, not a function
Merge branch 'master' into flattened-repos

Conflicts:
	platform
	polymer.min.js
	polymer.min.js.map
	polymer.native.min.js
	polymer.native.min.js.map
	polymer.sandbox.min.js.map
rebuild