Fixes compilation issues.

Author: kzaher

Example/Example1_CustomizationUsingTableViewDelegate.swift

@@ -11,6 +11,7 @@ import UIKit
 import RxSwift
 import RxCocoa
 import RxDataSources
+import Differentiator
 
 struct MySection {
     var header: String

Example/Example4_DifferentSectionAndItemTypes.swift

@@ -10,6 +10,7 @@ import UIKit
 import RxDataSources
 import RxCocoa
 import RxSwift
+import Differentiator
 
 // the trick is to just use enum for different section types
 class MultipleSectionModelViewController: UIViewController {