Adding new version to test with.
Adding houses and hotels
Various bug fixes

Tweaks to jail functionality - begun adding property upgrade
functionality.
Jail bug fixes

Fixed bug allowing player to have a turn after being sent to jail from
chance or community chest cards.
Buy house functionality

Added checks for if player owns all properties of a colour group.
Houses and hotels

Finished implementation of houses and hotels according to official game
rules.
Updated todo list