fix for when the options are inherited from the provider

Author: crisbeto

src/roundProgress.js

@@ -41,6 +41,10 @@ angular.module('angular-svg-round-progress')
                     var lastAnimationId;
                     var parentChangedListener;
 
+                    scope.getOptions = function(){
+                        return options;
+                    };
+
                     var renderCircle = function(){
                         var isSemicircle     = options.semi;
                         var responsive       = options.responsive;

src/roundProgressService.js

@@ -31,7 +31,7 @@ angular.module('angular-svg-round-progress').service('roundProgressService', [fu
 
             while(!parent.hasClass('round-progress-wrapper')){
                 if(service.isDirective(parent)){
-                    parentScope = parent.scope().$parent;
+                    parentScope = parent.scope().$parent.getOptions();
                     value += ((+parentScope.offset || 0) + (+parentScope.stroke || 0));
                 }