Re-enabled `stalemate` doctests
A bit more of validEnds
Added license file
generateEnds
Fixed missing type notation from doctest
Approximate canMove
Merge branch 'feature/license'
Merge branch 'master' into feature/stalemate
Extracted `allMoves`
All Rook moves
Added activeSide filter to canMove, and more test cases
Testing the right variable helps
Set-ised `allMoves` and fleshed out tests
Better temporary implementation of threatSquares
Properly handle FEN starting at rank 8 not 1
Improved allMoves doctests (one day they'll pass)
Simplified `populatedSquares`
Added TODO about refactor
Still not getting rank/file loading right; added (failing) test
Documentation and brief doctest for rowFromFEN'