message: Removed < 20 hack
  Now Activities are tied to crumbs shared elements work from all Activities
diff: @@ -103,7 +103,7 @@ public class NavigationStackView extends ViewGroup {
  int exit = getAnimationResourceId(exitAnim, activityCloseExitAnimationId);
  final HashMap<String, View> oldSharedElementsMap = getSharedElementMap();
  boolean orientationChanged = currentActivity.getIntent().getIntExtra(SceneActivity.ORIENTATION, 0) != currentActivity.getResources().getConfiguration().orientation;
  - Pair[] oldSharedElements = (!orientationChanged && crumb < 20 && currentCrumb - crumb == 1) ? getSharedElements(oldSharedElementsMap, oldSharedElementNames) : null;
  + Pair[] oldSharedElements = (!orientationChanged && currentCrumb - crumb == 1) ? getSharedElements(oldSharedElementsMap, oldSharedElementNames) : null;
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP && oldSharedElements != null && oldSharedElements.length != 0) {
  final SharedElementTransitioner transitioner = new SharedElementTransitioner(currentActivity, getSharedElementSet(oldSharedElementNames));
  currentActivity.setEnterSharedElementCallback(new SharedElementCallback() {
  