The app-element is redundant in this example I think.
I forgot to pull latest changes.
When I tried to push I saw your changes. I hope you don't mind that I removed the app-element.

Merge branch 'master' of github.com:ErikGrimes/polymer_ui_elements

Conflicts:
	example/polymer_ui_arrow.html
	example/src/polymer_ui_arrow/app_element.dart
	example/src/polymer_ui_arrow/app_element.html
	lib/polymer_ui_arrow.html
	lib/polymer_ui_arrow/polymer_ui_arrow.dart
Merge branch 'master' of github.com:ErikGrimes/polymer_ui_elements