Create generation rules.

[hahaharry10]

The Rules as outlined by Wikipedia:

• [ ] Any live cell with fewer than two live neighbours dies, as if by underpopulation.
• [ ] Any live cell with two or three live neighbours lives on to the next generation.
• [ ] Any live cell with more than three live neighbours dies, as if by overpopulation.
• [ ] Any dead cell with exactly three live neighbours becomes a live cell, as if by reproduction.

[hahaharry10]

rules will be implemented in terms of conditions that cause a cell state change:

• An alive cell dies if the number of alive cells is > 3 OR < 2.
• A dead cell is revived if the number of neighbouring alive cells is exactly 3.

[hahaharry10]

Rules implemented in a04a73e94cd25b6200efdb7e51082a6534a78e21.