First good working version of BOT

Bot now works with players already connected to the server.
+ Added function get_cvar()
+ Query command now has 5 attempts for success.
CODE DESIGN fix
Added 4.2.016 support
Added 4.2.017 support
Added 4.2.018 support

+ new define for <non-client>
Dunno with which version it comes but I found it in 4.2.018 and I will
continue with support from this version.
FIX: Self Kill is not Team Kill

+ Added reason for Self Kills, like: Team Change, Trigger Kill or
Lemming Thing