add messaging section, add LayerKit, and add Atlas to UI section

README.md

@@ -21,6 +21,7 @@ Projects in Swift language will be marked with :🔶: feel free to add your proj
      - [Layout](#layout)
      - [Logging](#logging)
      - [Maps](#maps)
+     - [Messaging](#messaging)
      - [Location](#location)
      - [Networking](#networking)
      - [Push Notifications](#push-notifications)
@@ -174,6 +175,9 @@ Projects in Swift language will be marked with :🔶: feel free to add your proj
  * [NAMapKit](https://github.com/neilang/NAMapKit) - Allows you to use custom maps in iphone applications and attempts to mimics some of the behaviour of the MapKit framework.
 * [Mapbox GL](https://github.com/mapbox/mapbox-gl-native) - An OpenGL renderer for Mapbox Vector Tiles with SDK bindings for iOS.
 
+### Messaging
+ * [LayerKit](https://github.com/layerhq/releases-ios) - iOS SDK for Layer, the easiest way to add in-app messaging (text, photos, videos, data) to any mobile or web application.
+
 ### Location
  * [IngeoSDK](https://github.com/IngeoSDK/ingeo-ios-sdk) - Always-On Location monitoring framework for iOS.
  * [Proxitee](https://github.com/Proxitee/iOS-SDK) - Allows developers to create proximity aware applications utilizing iBeacons & geo fences.
@@ -265,6 +269,7 @@ Projects in Swift language will be marked with :🔶: feel free to add your proj
  * [SVWebViewController](https://github.com/TransitApp/SVWebViewController) - A drop-in inline browser for your iOS app.
  * [MVAutocompletePlaceSearchTextField](https://github.com/mrugrajsinh/MVAutocompletePlaceSearchTextField) - A drop-in Autocompletion control for Place Search like Google Places, Uber, etc.
  * [MVMaterialView](https://github.com/mrugrajsinh/MVMaterialView) - Subclass of UIControls and UIButton to mimic Ripple effect of Material Design concept.
+ * [Atlas](https://github.com/layerhq/Atlas-iOS) - A library of native iOS messaging user interface components for Layer.
 
 ### WebSocket
  * [Socket Rocket](https://github.com/square/SocketRocket) - A conforming Objective-C WebSocket client library.