docs(guide/ie): fix typo

The escaping of the colon in the example CSS is incorrect.
Replace `ng\\:view {` with `ng\:view {`

Closes #4570
chore(ngdocs): improve the docs search placeholder text
docs(form): fix typo

Close #4671
docs(guide/e2e-testing): callout ngmodel vs attr

Add note that `input()` fn matches ng-model instead of HTML name attribute.
About five users on forums were snagged by this assumption:
http://docs.angularjs.org/guide/dev_guide.e2e-testing#comment-898079915

Closes #4655
docs($resource): fix typo

Closes #4670
docs(tutorial/index): fix git clone URL

Closes #4536