issue-16: New convenience method

Source/SideNavController.swift

@@ -330,6 +330,19 @@ public class SideNavController: MaterialViewController, UIGestureRecognizerDeleg
         setupRightView()
         setupRightView()
     }
     }
     
     
+    /**
+    :name:	init
+    */
+    public convenience init(mainViewController: UIViewController, bottomViewController: UIViewController, rightViewController: UIViewController) {
+        self.init()
+        self.mainViewController = mainViewController
+        self.bottomViewController = bottomViewController
+        self.rightViewController = rightViewController
+        setupView()
+        setupBottomView()
+        setupRightView()
+    }
+	
 	//
 	//
 	//	:name:	viewDidLoad
 	//	:name:	viewDidLoad
 	//
 	//