Sudoku Android Tutorial in Kotlin

This is the code from my Sudoku Android Tutorial in Kotlin series on YouTube.

The code at the end of each tutorial can be found by using the branch tab above this README. The master branch contains the most updated code from the tutorial. Here is a list of the videos:

1. Setup and Basic UI
2. Lines and Cell Selection
3. Game Backend with ViewModel/LiveData
4. Board Backend and User Input
5. Starting Cells
6. Notes
7. Delete