client freeze prediction & Line Grenade

hi @def- 
can u add predict freeze on clientpatch to ddnet source ? its very usefull I think.
https://github.com/ftk/XXLDDRace/commit/861ad6be6083aea40ac35075d64483596adf222d

and if u can create a line for grenade , its usefull when dynamiccammera is off .