fix(ngResource): Remove request body from $delete

Prevent the  obj.$delete instance method from sending the resource as the request body.  This commit uses the existing hasBody boolean to only set httpConfig.data for methods which should have a request body.

Closes #4280
feat($location): add support for state and title in pushState

Adds $location pushState & replaceState methods acting as proxies to history
pushState & replaceState methods. This allows using pushState to change state
and title as well as URL. Note that these methods are not compatible with
browsers not supporting the HTML5 History API, namely IE<10.