Add disability class

[dday76]

I'd like to set a time to add the disability class just so I understand the process a bit better, but it's not necessary. If you can add the disability class, I can fiddle with the combat logic, or if we can have a joint session to talk through it, that would be helpful for me.

[doughague]

From the wiki:

Need to add a Disability class (or disability parameters or sub-class for warrior) as well. That should include:

• fatigue (0-100% exhausted),
• stun (int, generally 0 or 1),
• disarm (bool),
• fallen (bool),
• fatigue/time (from wounds),
• health/time (from wounds).

These attributes would all initialize to zero at the beginning of each fight. But Long-term this would persist between fights to simulate recovery from wounds.

Done.

[dday76]

One addition here is 'fallen' (bool) to identify if the warrior has fallen to the ground. I forgot to add that initially.

[dday76]

All added to Disability src/hh.