refactor(demo): resolve JSHint warnings

- Use $log instead of console as it's safer and always defined
- JSHint thinks usage of alert is possibly development code, so use
  $window.alert instead

Author: chrisirhc

src/dropdown/docs/demo.js

@@ -1,4 +1,4 @@
-angular.module('ui.bootstrap.demo').controller('DropdownCtrl', function ($scope) {
+angular.module('ui.bootstrap.demo').controller('DropdownCtrl', function ($scope, $log) {
   $scope.items = [
     'The first choice!',
     'And another choice for you.',
@@ -10,7 +10,7 @@ angular.module('ui.bootstrap.demo').controller('DropdownCtrl', function ($scope)
   };
 
   $scope.toggled = function(open) {
-    console.log('Dropdown is now: ', open);
+    $log.log('Dropdown is now: ', open);
   };
 
   $scope.toggleDropdown = function($event) {

src/pagination/docs/demo.js

@@ -1,4 +1,4 @@
-angular.module('ui.bootstrap.demo').controller('PaginationDemoCtrl', function ($scope) {
+angular.module('ui.bootstrap.demo').controller('PaginationDemoCtrl', function ($scope, $log) {
   $scope.totalItems = 64;
   $scope.currentPage = 4;
 
@@ -7,7 +7,7 @@ angular.module('ui.bootstrap.demo').controller('PaginationDemoCtrl', function ($
   };
 
   $scope.pageChanged = function() {
-    console.log('Page changed to: ' + $scope.currentPage);
+    $log.log('Page changed to: ' + $scope.currentPage);
   };
 
   $scope.maxSize = 5;

src/tabs/docs/demo.js

@@ -1,12 +1,12 @@
-angular.module('ui.bootstrap.demo').controller('TabsDemoCtrl', function ($scope) {
+angular.module('ui.bootstrap.demo').controller('TabsDemoCtrl', function ($scope, $window) {
   $scope.tabs = [
     { title:'Dynamic Title 1', content:'Dynamic content 1' },
     { title:'Dynamic Title 2', content:'Dynamic content 2', disabled: true }
   ];
 
   $scope.alertMe = function() {
     setTimeout(function() {
-      alert('You\'ve selected the alert tab!');
+      $window.alert('You\'ve selected the alert tab!');
     });
   };
 });

src/timepicker/docs/demo.js

@@ -1,4 +1,4 @@
-angular.module('ui.bootstrap.demo').controller('TimepickerDemoCtrl', function ($scope) {
+angular.module('ui.bootstrap.demo').controller('TimepickerDemoCtrl', function ($scope, $log) {
   $scope.mytime = new Date();
 
   $scope.hstep = 1;
@@ -22,7 +22,7 @@ angular.module('ui.bootstrap.demo').controller('TimepickerDemoCtrl', function ($
   };
 
   $scope.changed = function () {
-    console.log('Time changed to: ' + $scope.mytime);
+    $log.log('Time changed to: ' + $scope.mytime);
   };
 
   $scope.clear = function() {