feat(state): get any property of any state

Example:
```javascript
var url = $state.getOptionOfState('url', 'myStateName')
```

Author: davidnpma

src/state.js

@@ -222,7 +222,7 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory,           $
           exiting = fromPath[l];
           if (exiting.self.onExit) {
             $injector.invoke(exiting.self.onExit, exiting.self, exiting.locals.globals);
-          } 
+          }
           exiting.locals = null;
         }
 
@@ -279,6 +279,11 @@ function $StateProvider(   $urlRouterProvider,   $urlMatcherFactory,           $
       return !$locationProvider.html5Mode() && url ? "#" + url : url;
     };
 
+    $state.getOptionOfState = function (option, stateOrName) {
+      var state = findState(stateOrName);
+      return state.self[option];
+    };
+
     function resolveState(state, params, paramsAreFiltered, inherited, dst) {
       // We need to track all the promises generated during the resolution process.
       // The first of these is for the fully resolved parent locals.