To do list
==========
HTML manual
Tidy up code.
Finish Spanish version
Finish German version
Finish French version
Add Italian version
Add Dutch version
Networking
Music
Better graphics
Better presentation
"Arcade mode" - each player has limited time to make move
Progression mode - one-player mode allows player to move through difficulty levels
Help system
Add mouse control

Existing bugs
=============
Not possible to install anywhere except default location
