audit license headers
Update tests to latest web-component-tester.
Add support for iOS8 scroll events.
Update bower ignore to only include production files.
Merge pull request #30 from Polymer/2way-improved

2-way binding, bindable selection, and efficiency improvements - fixes #2 #7 #9 #13 #15
Remove commented CSS.
Merge branch 'master' into 2way-variable

Conflicts:
	core-list.css
	core-list.html
	package.json
	test/core-list-basic.html
	test/core-list-data.html
	test/core-list-selection.html
Update usage of paper-menu-button.