Fixing game crash (when leaving a game)

PersistScripts: - [UNDERSCORE, 'poco\common.luac'] - [PocoHud3, 'poco\Hud3.luac']

--03.29.15 Edited--The fix applied in recent release (after r344)--IMPORTANT NOTE--If there is "PD2hook.yml" in PAYDAY 2 folder,Otherwise, open PD2hook.yml through notepad++ and delete every lines related to pocohud in "PersistScripts" section.[UNDERSCORE, 'poco\common.luac'] and [PocoHud3, 'poco\Hud3.luac']