Obsolete this example app project

Added a description to inform this project is obsoleted.

Author: yoichitgy

README.md

@@ -1,5 +1,9 @@
 # SwinjectSimpleExample
 
+**[OBSOLETED] This example app is obsoleted and no longer follow the latest Xcode/Swift/Swinject versions.**
+
+--- 
+
 This is an example project to demonstrate [dependency injection](https://en.wikipedia.org/wiki/Dependency_injection) and [Swinject](https://github.com/Swinject/Swinject) in a simple weather app that lists current weather information at some locations.
 
 ![Screenshot](Assets/SwinjectSimpleExampleScreenshot.png)