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Merge pull request #12 from mbasaglia/nade_bonus_counter

Update to nade bonus
Begin adding a minor score field for frags, pickups etc.
Make sure nades are enabled before giving bonus score
Ice nades
Missing style cases for ice nades
Tweak ice nade effects
Remove cvar for friendly ice nade freezing
freeze field for ice nades
Drop flags on ice nade
Ice nades HUD