Updated Podspec and README for Cocoapods.

Convert to Swift 2.3 syntax

Example/Pods/Pods.xcodeproj/project.pbxproj

@@ -365,6 +365,11 @@
 			attributes = {
 				LastSwiftUpdateCheck = 0700;
 				LastUpgradeCheck = 0720;
+				TargetAttributes = {
+					92B1C7A9E8122442B031A44C1CA691AF = {
+						LastSwiftMigration = 0800;
+					};
+				};
 			};
 			buildConfigurationList = 2D8E8EC45A3A1A1D94AE762CB5028504 /* Build configuration list for PBXProject "Pods" */;
 			compatibilityVersion = "Xcode 3.2";
@@ -644,6 +649,7 @@
 				PRODUCT_NAME = SideMenu;
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
+				SWIFT_VERSION = 2.3;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";
@@ -705,6 +711,7 @@
 				SDKROOT = iphoneos;
 				SKIP_INSTALL = YES;
 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
+				SWIFT_VERSION = 2.3;
 				TARGETED_DEVICE_FAMILY = "1,2";
 				VERSIONING_SYSTEM = "apple-generic";
 				VERSION_INFO_PREFIX = "";

Pod/Classes/SideMenuTransition.swift

@@ -297,7 +297,7 @@ internal class SideMenuTransition: UIPercentDrivenInteractiveTransition, UIViewC
     internal func animateTransition(transitionContext: UIViewControllerContextTransitioning) {
         
         // get reference to our fromView, toView and the container view that we should perform the transition in
-        let container = transitionContext.containerView()!
+        let container = transitionContext.containerView()
         if let menuBackgroundColor = SideMenuManager.menuAnimationBackgroundColor {
             container.backgroundColor = menuBackgroundColor
         }

SideMenu.podspec

@@ -8,7 +8,7 @@
 
 Pod::Spec.new do |s|
   s.name             = "SideMenu"
-  s.version          = "1.2.0"
+  s.version          = "1.2.1"
   s.summary          = "Simple side menu control for iOS in Swift inspired by Facebook. Right and Left sides. No coding required."
 
 # This description is used to generate tags and improve search results.