Nostalgia 1.0-Alpha

The following features and functionalities are supported:

1. Three different playing modes as explained in the README.md document: Human Vs Human, Human Vs Computer, and Computer Vs Computer. The user can also choose which side to play.
2. Chess Engine (used in Human Vs Computer and in Computer Vs Computer modes).
3. Simple Graphical User Interface.
4. An independent move validator (that is not part of the engine). This is used only in the Human vs Human mode.
5. Chess Algebraic Notations. You can see this in the history pane.
6. Undo/Redo operations.
7. User's option to resign from any game. This isn't applicable in Computer Vs Computer mode.
8. Board rotation.