技能说明：
1. Machete (More Damage/Low Speed)伤害大，移动速度小
2. Bak Knife (No Footsteps)移动无声
3. Pocket Knife (High Speed)高速移动
4. Butcher Knife (Low Gravity)低重力
5. Default Knife (Health Regeneration)生命恢复
管理员命令
km_highspeed 340 (sets the speed for Pocket Knife)
km_lowspeed 170 (sets the speed for Machete)
km_addhealth 3 (sets the health you will gain with Default Knife)
km_maxhealth 75 (sets the healt you can reach when healing D-knife)
km_damage 2 (damage multiplier for Machete)
km_lowgravity 400 (sets the low gravity)
