minor updates on ordering for bottomNavigationBar

Examples/Programmatic/App/App/AppNavigationController.swift

@@ -61,7 +61,6 @@ class AppNavigationController: NavigationController {
 	
 	/// Prepares the navigationBar
 	private func prepareNavigationBar() {
-		navigationBar.tintColor = MaterialColor.white
 		navigationBar.backgroundColor = MaterialColor.blue.base
 	}
 }

Examples/Programmatic/App/App/RecipesViewController.swift

@@ -108,7 +108,7 @@ class RecipesViewController: UIViewController {
 		
 		let vc: AppSearchBarController = AppSearchBarController(rootViewController: RecommendationViewController(dataSourceItems: recommended))
 		vc.modalTransitionStyle = .CrossDissolve
-		navigationController?.presentViewController(vc, animated: true, completion: nil)
+		presentViewController(vc, animated: true, completion: nil)
 	}
 	
 	/// Prepares the items Array.

Sources/iOS/BottomNavigationController.swift

@@ -143,8 +143,9 @@ public class BottomNavigationController : UITabBarController, UITabBarController
 	/// Prepares the tabBar.
 	private func prepareTabBar() {
 		tabBar.depth = .Depth1
+		let image: UIImage? = UIImage.imageWithColor(MaterialColor.clear, size: CGSizeMake(1, 1))
+		tabBar.shadowImage = image
+		tabBar.backgroundImage = image
 		tabBar.backgroundColor = MaterialColor.white
-		tabBar.shadowImage = UIImage.imageWithColor(MaterialColor.clear, size: CGSizeMake(1, 1))
-		tabBar.backgroundImage = UIImage()
 	}
 }