Document player stats

[tagniam]

In the README there should be a sub-section under How To Play called Player Classes. The documentation should follow this table template:

Name	Attack Damage	Risk Attack Damage	Healing Amount
Player 1	10-15	20-25	10-15
Player 2	10-15	20-25	10-15

etc.

The Warrior, Rogue, Healer, Debugger, and Saitama player classes should be documented.
The attack/risk attack/healing points is documented in each player's corresponding cpp file.

[tenosiswono]

I'll do it