Added checks for null pointers into GetPlayerGaitsequence
Fixed mp_nadedrops: If pressed a the button attack before player death, then not drop nades to ground.
Compiler: remove rrti, added -ipo
Refactoring
Removed some useless code in CBasePlayerWeapon::GetNextAttackDelay
Removed the allocation of the entity CSoundEnt, because it is useless for CS 1.6 also removed UpdatePlayerSound
Fixed some critical bugs and typos (carrer_task, tutor, zbot and other)
Added command line option `-bots` to run bots in CS 1.6
Removed the tests demo record/player from myself the project and also dependency of the steam library.
Fixed the progress bar when generating a nav file.
