fix(element binder): Use the new-style Module.bind(toFactory) syntax
fix(various): Use the new-style Module.bind(toFactory) syntax
fix(element binder): New-style Module.bind for AttrMustache
fix(ng-model): Turn off failing test until Dart 1.6 is stable.

The test is passing when ran in isolation with ddescribe. And the
feature is working fine end-to-end (typeless <input ng-model> element).

Closes #1234
chore(travis): run e2e tests as a separate job

Closes #1222
fix(introspection): getTestability should throw when ElementProbes are unavailable