Adds rollermine configuration.

• Added configurable rollermine damage using a damage scale.
  • weapon_ttt_rollermine_damage_scale
    
  • Default scale of 1.5
    
  • Side attacks = scale x 5HP
    
  • All other attacks = scale x 10HP
• Added configurable rollermine health
  • weapon_ttt_rollermine_health
    
  • Default value of 2500HP
• Added explosion damage 3 seconds after rollermine death
  • weapon_ttt_rollermine_explosion_damage
    
  • Default max damage is 75HP
• Reduced knockback on the rollermine when shot
  
• Set traitor who threw rollermine as cause of rollermine damage
  
• Changed rollermine to appear to shock the player who threw it, but no damage will be done
  
• Stops the rollermine from spawning inside the player

Added initial files.