fix(date-comparison): equalForKeys now supports dates

Author: Yankovsky

src/common.js

@@ -7,6 +7,7 @@ var isDefined = angular.isDefined,
     isString = angular.isString,
     isObject = angular.isObject,
     isArray = angular.isArray,
+    isDate = angular.isDate,
     forEach = angular.forEach,
     extend = angular.extend,
     copy = angular.copy;
@@ -126,7 +127,11 @@ function equalForKeys(a, b, keys) {
 
   for (var i=0; i<keys.length; i++) {
     var k = keys[i];
-    if (a[k] != b[k]) return false; // Not '===', values aren't necessarily normalized
+    if (isDate(a[k]) && isDate(b[k])) {
+      if (a[k].getTime() !== b[k].getTime()) return false;
+    } else {
+      if (a[k] != b[k]) return false; // Not '===', values aren't necessarily normalized
+    }
   }
   return true;
 }