Native Linux support

entity forcefield now turns red when strength is negative

fix freezing on certain maps

Chinese (traditional) localization

Add Bulgarian translation

fix presets import error

(IN THEORY)
-fix changing limit freeze
-fix crash on disconnect
-fix occasional hanging in multiplayer

potential fix for no world collision

french localization
smg grenade interaction
(needs testing) potential fix to crashing

add localizations for:
Hungarian
Ukrainian
Polish
Simplified Chinese