Add capability to update the chart from angular external controller

Readme.md

@@ -221,8 +221,8 @@ chart.enableAnimation();
 ```javascript
 new EasyPieChart(element, {
   barColor: function(percent) {
-    var ctx = this.renderer.getCtx();
-    var canvas = this.renderer.getCanvas();
+    var ctx = this.renderer.ctx();
+    var canvas = this.renderer.canvas();
     var gradient = ctx.createLinearGradient(0,0,canvas.width,0);
         gradient.addColorStop(0, "#ffe57e");
         gradient.addColorStop(1, "#de5900");
@@ -265,4 +265,4 @@ Thanks to [Rafal Bromirski](http://www.paranoida.com/) for designing [this dribb
 
 
 ## Copyright
-Copyright (c) 2015 Robert Fleischmann, contributors. Released under the MIT, GPL licenses
+Copyright (c) 2016 Robert Fleischmann, contributors. Released under the MIT, GPL licenses

dist/angular.easypiechart.js

@@ -19,7 +19,7 @@
     // like Node.
     module.exports = factory(require("angular"));
   } else {
-    factory(angular);
+    factory(root["angular"]);
   }
 }(this, function (angular) {
 
@@ -61,11 +61,17 @@
 					};
 					scope.options = angular.extend(options, scope.options);
 
-					var pieChart = new EasyPieChart(element[0], options);
+					var pieChart = new EasyPieChart(element[0], options),
+						currentValue = 0;
 
 					scope.$watch('percent', function(newVal, oldVal) {
+						currentValue = newVal;
 						pieChart.update(newVal);
 					});
+
+					scope.$on('update-easy-pie-chart', function() {
+						pieChart.update(currentValue);
+					});
 				}
 			};
 		}]);

dist/jquery.easypiechart.js

@@ -19,7 +19,7 @@
     // like Node.
     module.exports = factory(require("jquery"));
   } else {
-    factory(jQuery);
+    factory(root["jQuery"]);
   }
 }(this, function ($) {