aim: improved enemy prediction once again
nav: bots with hostages will try to take all hostages that are near with him instead of going directly to rescue zone
manager: fixed engine errors when removing bots with kickall with instant parameter
graph: strip http:// prefix from graph upload url, it should be always http for now
bot: improve handling of smoke grenades on ground (restored code from old yapb2 branch)
fix: buy: bots never buy enough ammo for secondary weapons
fix: yb_pickup_best disabling all pickups instead of weapons only
add: yb_pickup_ammo_and_kits, that allows to enable ammos medkits and kevlars
refactor: switched to crlib strings where possible
refactor: fix some compiler warnings at high levels
refactor: move constants to separate header (thx @spodlesniy)
