Update readme

Author: tailec

README.md

@@ -69,7 +69,7 @@ The purpose of having examples with single page applications is highlighting con
 
 | Example | Description |
 | ------------- | ------------- |
-| [mvc](mvc) | Standard MVC pattern recommended by Apple. |
+| [mvc](mvc) | Standard MVC pattern recommended by Apple. Uses composition design pattern to make `ViewController`  smaller. |
 | [mvvm-rxswift-pure](mvvm-rxswift-pure) | Uses [RxSwift](https://github.com/ReactiveX/RxSwift) and observables as binding mechanism between `ViewController` and `ViewModel`. |
 | [mvvm-rxswift-functions-subjects-observables](mvvm-functions-subjects-observables) | Uses [RxSwift](https://github.com/ReactiveX/RxSwift) and observables as outputs from `ViewModel`. `ViewModel` inputs are defined as subjects wrapped in functions. |
 | [mvvm-rxswift-subjects-observables](mvvm-rxswift-subjects-observables) | Uses [RxSwift](https://github.com/ReactiveX/RxSwift) with observables as `ViewModel` outputs and subjects as `ViewModel` inputs. |