TODO

- Add more stuff to the Chess namespace (Game, Player, etc.)
  chess.h should probably be in lib/src, not lib/src/chessboard

- Complete Xboard and UCI support (including the analysis feature)

- More unit tests for the Chess library

- Better error handling in OpeningBook

- Better error handling in PgnGame

- FICS support

- Add a bunch of bugs to Sloppy, and test it with the gui

- Create an engine-testing tool for the gui, which finds out and summarizes
  the engine's features, and runs tests:
  - illegal moves
  - invalid FEN strings
  - very long strings
  - invalid time controls (eg. negative time left)
  - negative minimum search depth
  - test the ping time

- EPD tests for engines

- Design a file format for tournaments

- Provide code examples in documentation

- Verify Qt version requirement before release

- Use PgnStream for HTTP downloading

- Apply for the Qt Application Showroom after first public
  release: https://showroom.qt.io/

- Allow setting engine options again for each game instead of only once for the whole match

- Support the Xboard "draw" command

- WesternBoard should support file and rank strings of arbitrary length

- Update documentation for engines.json. At the moment there's nothing about
  "restart", "variants" or "options".


# User Interface
--------------

- (Mac) dropping FEN on Cute Chess' icon in Dock

- (Mac) provide Dock menu

- (Mac) provide global menubar

- Per window dialogs should use QDialog::open() instead of exec()

- Moving a piece by selecting (clicking with a mouse) a source and a
  destination squares

- Highlight attacked pieces

- Analyzing feature. Probably should be placed in its own dock window with a
  selectable list of engines.

- There should be no "whitepov" option for UCI engines (it should always be OFF)

- Add a time control widget that can be embedded in New Game dialog