Update readme

README.md

@@ -205,6 +205,7 @@ ImageManager.shared = ImageManager(configuration: configuration)
 To install Nuke add a dependency in your Podfile:
 ```ruby
 # use_frameworks!
+# platform :ios / :watchos / :osx
 pod "Nuke"
 pod "Nuke-Alamofire-Plugin" # optional
 pud "Nuke-AnimatedImage-Plugin" # optional
@@ -218,6 +219,15 @@ github "kean/Nuke"
 github "kean/Nuke-Alamofire-Plugin" # optional
 ```
 
+### Import
+
+Import installed modules in your source files
+```swift
+import Nuke
+import NukeAlamofirePlugin
+import NukeAnimatedImagePlugin
+```
+
 ## <a name="h_requirements"></a>[Requirements](https://github.com/kean/Nuke/wiki/Supported-Platforms)
 - iOS 8.0+ / watchOS 2.0+ / OS X 10.9+
 - Xcode 7.0+, Swift 2.0+