The robot class system allows robots can have different capabilities. Normally one capability will be increased while another is decreased. For example, a robot may take less damage (better) but have a lower max speed (worse). Robots are in the "default" class unless a different class is specified.
Classes must be enabled by adding the -allowclasses option to the server. Once enabled, robots can specify a class in the joinRequest message. For example:
{ 'type': 'joinRequest', 'name': 'Super Robot V3', 'class': 'heavy' }
