docs(input): update $parsers NgModelController doc

Make it clear that the result of the $parsers pipeline is what goes to the model value.

Closes #5708
docs(forms): generated CSS classes for forms and inputs must have a ng prefix
style: enable jscs requireRightStickedOperators rule
feat(bidi): Add bidirectional text support

This adds bidirectional text support to interpolations (`{{...}`),
`ng-bind`, `ng-bind-html`, `ng-bind-template` and `ng-model`.

The main part of the implementation is copied from Google Closure Library.