Adds "compare" links

Author: JoseAlcerreca

README.md

@@ -19,17 +19,17 @@ In this branch you'll find:
 This project hosts each sample app in separate repository branches. For more information, see the `README.md` file in each branch.
 
 ### Stable samples - Kotlin
-| Sample | Description |
+|     Sample     | Description |
 | ------------- | ------------- |
-| [master](https://github.com/googlesamples/android-architecture/tree/master) | The base for the rest of the branches. Uses Kotlin, Architecture Components, coroutines, Data Binding, etc. |
-| [dagger-android](https://github.com/googlesamples/android-architecture/tree/dagger-android) | A simple Dagger setup that uses `dagger-android` and removes the two flavors. |
-| [usecases](https://github.com/googlesamples/android-architecture/tree/usecases) | Adds a new domain layer that uses UseCases for business logic. |
+| [master](https://github.com/googlesamples/android-architecture/tree/master) | The base for the rest of the branches. <br/>Uses Kotlin, Architecture Components, coroutines, Data Binding, etc. |
+| [dagger-android](https://github.com/googlesamples/android-architecture/tree/dagger-android)<br/>[[compare](https://github.com/googlesamples/android-architecture/compare/dagger-android#files_bucket)] | A simple Dagger setup that uses `dagger-android` and removes the two flavors. |
+| [usecases](https://github.com/googlesamples/android-architecture/tree/usecases)<br/>[[compare](https://github.com/googlesamples/android-architecture/compare/usecases#files_bucket)] | Adds a new domain layer that uses UseCases for business logic. |
 
 ### Samples in development - Kotlin
 
 | Sample | Description |
 | ------------- | ------------- |
-| [reactive](https://github.com/googlesamples/android-architecture/tree/reactive) | Modifies the data layer so UIs react to changes automatically using Room as source of truth. |
+| [reactive](https://github.com/googlesamples/android-architecture/tree/reactive)<br/>[[compare](https://github.com/googlesamples/android-architecture/compare/reactive#files_bucket)] | Modifies the data layer so UIs react to changes automatically using Room as source of truth. |
 
 ### Old samples - Kotlin and Java