docs(guide): fix injector service code example

Fix syntax and update code to the latest API
docs(README.md): add missing 'you' and a comma
feat(docs): Add angularjs tag to plunks and make private

This is a minor edit to allow Plunks created by way of the docs.angularjs.org site to be appropriately tagged as `angularjs`.
Also, make these generated Plunks private by default.
fix($route): correctly extract $routeParams from urls

Routes like '/bar/foovalue/barvalue' matching '/bar/:foo/:bar'
now are well mapped in $routeParams to:
{bar:'barvalue', foo:'foovalue'}

Closes: #1501
Signed-off-by: Gonzalo Ruiz de Villa <gonzaloruizdevilla@gmail.com>
docs(ngView): fix code example (change template to templateUrl)

Closes #1715
docs(directive): old syntax
docs(guide): minor English corrections to the Directive guide
docs(anchorScroll): correct word "location"
docs(guide): change example controller to properly call greet method on greeter
docs($http): clarify documentation on error status codes

Modify the documentation for $http to correspond to what Angular
considers a success status code.

Closes #1693