aim: tweaked a bit grenade handling, so bots should use them more
aim: reduce time between selecting grenade and throwing it away
aim: removed hacks in look angles code, due to removing yb_whoose_your_daddy cvar
aim: use direct enemy origin from visibility check, and not re-calculate it
aim: update enemy prediction, so it now depends on frame interval for a bot
aim: additional height offset are tweaked, and now used only for difficulty 4
nav: tweaked a bit player avoidance code, and it's not preventing bot from checking terrain
nav: do not check banned nodes, when bucket sizes re too low
nav: cover nodes are now selected depending on total bots on server
nav: let bot enter pause task after long jump
nav: extend velocity by a little for a jump, like it was in first versions of bot
nav: stuck checking is now taken in account lower minimal speed if bot is ducking
fix: navigation reachability timers, so bots will have correct current node index while camping
fix: bots are unable to finish pickup or destroy breakable task, if target is not reachable
fix: cover nodes are now calculated as they should
fix: manual calling bots add_[t/ct] now ignores yb_join_team cvar
bot: tweaked a little difficulty levels, so level 4 is now nightmare level, and 3 is very heard
bot: minor refactoring and moving functions to correct source file
bot: add yb_economics_disrespect_percent, so bots can ignore economics and buy more different guns
bot: add yb_check_darkness that allows to disable darkness checks for bot, thus disallowing usage of flashlight
bot: camp buttons are now lightly depends on bot health
chat: welcome chat message from bots is now sent during first freeze time period
crlib: switch over to stdint.h and remove crlib-own types
crlib: fixed alignment in sse code
fix: bots try to defuse already beeing defused bomb (fixes#116).
fix: line ending in source code.
fix: do not retreat with sniper weapon, if currently shooting and have ammo.
crlib: added deque class.
