Exercise 1

Add Kotlin support to the "To Do" app.

Exercise 2

Convert all classes in todo.list package to Kotlin and clean up converted files to remove as many instances of !! as possible.

Exercise 3a

Use Kotlin Android Extensions library to remove instances of findViewById(...) in converted Kotlin files.

apply plugin: 'kotlin-android-extensions'

Exercise 3b

Add to-do details screen feature in Kotlin. This screen should allow marking a to-do item as complete.

Use Kotlin's collections API to remove completed to-do items from the main listing.