feat(platform): Make angular invoke web_component polyfills for browsers without native web_component implementations.
perf(NodeCursor): Do not duplicate child nodes
perf(selector): Remove an useless check
perf(tagging_view_factory): Move a test out of the loop
style: code cleanup
perf(_ElementSelector): Remove recursion in addDirective
docs(formatter): Fix a few typos
chore(travis): Fix Travis fetch for Dartium to handle redirects
chore(travis): Fix bad linebreak in previous commit
fix(dccd): fix DirtyCheckingRecord.toString() throws an exception

closes #1057