Last emitted millisecond is 0

Changed the order of execution to make 0 the last emitted millis value
for a countdown. Previously the last emit message was the value just
before 0. For example with a countdown with an interval of 1000 the last
emitted millis value was 1000.

Author: johnparn

dist/angular-timer.js

@@ -147,21 +147,21 @@ angular.module('timer', [])
             return;
           }
           calculateTimeUnits();
-          if ($scope.countdown > 0) {
-            $scope.countdown--;
-          }
-          else if ($scope.countdown <= 0) {
-            $scope.stop();
-            return;
-          }
-
           //We are not using $timeout for a reason. Please read here - https://github.com/siddii/angular-timer/pull/5
           $scope.timeoutId = setTimeout(function () {
             tick();
             $scope.$digest();
           }, $scope.interval - adjustment);
 
           $scope.$emit('timer-tick', {timeoutId: $scope.timeoutId, millis: $scope.millis});
+          
+          if ($scope.countdown > 0) {
+            $scope.countdown--;
+          }
+          else if ($scope.countdown <= 0) {
+            $scope.stop();
+            return;
+          }
         };
 
         if ($scope.autoStart === undefined || $scope.autoStart === true) {