Add unit tests

[sahilshahpatel]

Add unit tests (and corresponding gamelog files). Dorian's initial listing is:

Moving characters in a line along an axis

• Move down/left/right/up one time from starting coordinate.
• Move down/left/right/up n times from any given initial coordinate.
• Move down/left/right/up n times from random coordinate.

Moving characters in a line along a diagonal

• Move in a diagonal based on a given quadrant one time from starting coordinate.
• Move in a diagonal based on a given quadrant n times from starting coordinate.
• Move in a diagonal based on a given quadrant n times from any given initial coordinate.
• Move in a diagonal based on a given quadrant n times from random coordinate.

Hop distances diagonally or straight

• Move down/left/right/up one time with a step size of k.
• Move down/left/right/up n times with a step size of k.
• Move diagonally based on a given quadrant one time with a step size of k.
• Move diagonally based on a given quadrant n times with a step size of k.

Changing tilemaps

• Fertility zone demonstration testing