[ASMapNode] Toggle user interaction when liveMap changes (#1753)

[ASMapNode] Change map snapshot when updating it with a new region (#1754)
[ASMapNode] Commented out code that is causing inaccurate behavior
[ASMapNode] Added the ability to zoom in and show annotations, similar to showAnnotations:animated: of MKMapView.
Added a basic example for ASMapNode to try out the different changes

examples/ASMapNode/Sample/ViewController.m

@@ -0,0 +1,53 @@
+//
+//  ViewController.m
+//  Sample
+//
+//  Copyright (c) 2014-present, Facebook, Inc.  All rights reserved.
+//  This source code is licensed under the BSD-style license found in the
+//  LICENSE file in the root directory of this source tree. An additional grant
+//  of patent rights can be found in the PATENTS file in the same directory.
+//
+//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+//  FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+//  ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+//  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+#import "ViewController.h"
+
+#import "MapHandlerNode.h"
+
+@interface ViewController ()
+
+@end
+
+@implementation ViewController
+
+
+#pragma mark - Lifecycle
+
+- (instancetype)init
+{
+  self = [super initWithNode:[[MapHandlerNode alloc] init]];
+  if (self == nil) { return self; }
+
+  return self;
+}
+
+#pragma mark - UIViewController
+
+- (void)viewDidLoad
+{
+  [super viewDidLoad];
+
+}
+
+- (void)viewWillAppear:(BOOL)animated
+{
+  [super viewWillAppear:animated];
+  self.navigationController.navigationBarHidden = true;
+}
+
+@end