[Examples] Move several simpler, single-purpose examples to extras to ensure Travis does not time out.

examples_extra/ASTraitCollection/Sample/ViewController.m

@@ -0,0 +1,45 @@
+/* This file provided by Facebook is for non-commercial testing and evaluation
+ * purposes only.  Facebook reserves all rights not expressly granted.
+ *
+ * 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 "KittenNode.h"
+#import "OverrideViewController.h"
+
+#import <AsyncDisplayKit/AsyncDisplayKit.h>
+#import <AsyncDisplayKit/ASAssert.h>
+
+@interface ViewController ()
+@end
+
+@implementation ViewController
+
+#pragma mark -
+#pragma mark UIViewController.
+
+- (instancetype)init
+{
+  KittenNode *displayNode = [[KittenNode alloc] init];
+  if (!(self = [super initWithNode:displayNode]))
+    return nil;
+
+  self.title = @"Display Node";
+  displayNode.imageTappedBlock = ^{
+    [KittenNode defaultImageTappedAction:self];
+  };
+  return self;
+}
+
+- (void)viewWillLayoutSubviews
+{
+  [super viewWillLayoutSubviews];
+}
+
+@end