doc(pick-pr): Remove an obsolete comment
Revert "chore: update pubspec.lock"

This reverts commit a157cb2b6af63f3897692aa6a85e6ce0a15de948.

This commit did not pass Travis.
feat(directives): remove the @Controller directive

Completely remove the deprecated Controller directive.

Major update to the demos to use setRootContext (where applicable) and
to move to Components for the beefier demos (bouncing balls and form).

A temporary work around was required in demos (animation and todo)
so that rootContext have Map interface. The work arounds will disappear
after the context is set to the component.

Library changes were pulled out of the first commit in #1269.

Closes #1401
feat(scope): move domWrite and domRead from RootScope to Scope

Closes #1161

Closes #1341
chore(package.json): require newer karma-dart

This is needed for PR 1375.
chore: improve "pubspec.yaml"s, update lock files

Closes #1258