chore(doc): minor doc edits
feat(ng-model): support input type=date | datetime and all other date/time variants

- Add support for input elements of type
`date|datetime|datetime-local|month|time|week`.
- Remove non-UTF-8 characters from some other API comments.

Closes #747
feat(Scope): Mirror Scope methods in ngScope.

`ngScope(element)` returns a proxy of Scope. This change adds methods isDestroyed, isAttached, destroy, emit and broadcast to the proxy.

Closes #850

Closes #858
style: Rename variables of the form $name into name .

Closes #854
fix(cookies): Make sure Cookies is injectable.

Also clean-up a few warnings and remove an unnecessary workaround
in the todo example.

Closes #856
feat(Scope): Allow turning emission of scope stats from console.

To enable emission of ScopeStats from console one can call function `enableScopeStats(Node)`. To disable call function `disableScopeStats(node)`.

Fixes #836

Closes #857
docs: Correct double import of annotations for documentation.
fix: dart2js build size checks relaxed