Update README.md

[JosephRidge]

I added more details on the existing documentation file , focusing on the set up process of Timber once the dependencies have been downloaded.

In the documentation of Timber it was not clear on the implementation process in the application in Kotlin, like described in this Fixes #466 #466 (comment).

To fix that, I added the procedure to implement it programmatically in the users code base. It being a documentation update, the necessity of a test was not in mind.

I added the following under the Set Up section.I updated documentation but i can roll back if needed

Step 1 : Create an Application class that inherits from Application class .

open class MyProjectApplication : Application() {
}

Step 2 : import the application package

import android.app.Application

Step 3 : override the onCreate() method and initialize the Timber class

override the onCreate() method in your Application class

open class MyProjectApplication : Application() {
    if (BuildConfig.DEBUG) {
      Timber.plant(new DebugTree());
    } else {
      Timber.plant(new CrashReportingTree());
    }
  ##}

Step 4 : Define it in your Android Manifest , Application tag

In your application tag, add it as a name attribute :

<application  
       ....
       android:name=".MyProjectApplication"
       android:theme="@style/AppTheme"
      .... >