Introduce Custom Elements
Introduce inheritance
Introduce HTML Templates
Introduce HTML Imports
Set up for next step ('bower install basic-list-box#master')
Introduce nested imports/component reuse
Introduce Shadow DOM
Use IDs for behavior instead of classes
Introduce Polymer
Introduce changed watchers
Introduce automatic node finding
Introduce declarative event mapping
Introduce data binding
Introduce template 'if' and 'repeat'
Introduce filters
Introduce published properties (use) and changed watchers
Introduce published properties (creation)