Created readme with basic details

Created readme with basic details

README.md

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+# Clean Code Architecture + MVVM + Testing
+
+Source code of [Medium Article](https://medium.com/@sreeharikv112/android-unit-testing-clean-code-architecture-with-mvvm-73eb2992cab7) which describes Android Unit Testing Clean Code Architecture with MVVM.
+
+
+## Architecture followed
+
+![ArchDiagram1](https://user-images.githubusercontent.com/39777674/71248284-78d00800-2340-11ea-9077-080e29a8c918.png)
+
+<br>
+
+## The article explains 
+
+
+- Ways to include dependencies using Koin 
+- Making usefull data flow using above architecture 
+- Creating unit test case with dependencies
+- Override the default dependencies 
+- Mock required dependency and create required test cases 
+
+<br>
+
+## Main libraries included
+
+- Coroutines https://developer.android.com/kotlin/coroutines
+
+- Retrofit https://square.github.io/retrofit/
+
+- MockWebServer https://github.com/square/okhttp/tree/master/mockwebserver
+
+- Koin (💉Dipendency Injection) https://insert-koin.io/
+
+- Kotlin (https://developer.android.com/kotlin)
+
+## Uses Swapi API for explaining required data flow 
+
+Uses https://swapi.co/ API as network end points. 
+
+The complete API documentation detail can be found over https://swapi.co/documentation