[ADD] zm_map_grass_v4

[Core]

zm_map_grass_v4
http://css.gamebanana.com/maps/184355

This is the latest version of the map. Fixed bugs with textures. Fixed bugs with sphere.
The map has 4 items:
Item 1: Accelerating pistols.
Item 2: Fire pistols (E). Works as a flamethrower.
Item 3: Repulsive staff (E).
Item 4: Sphere of death(zombie). Slows in a small radius. When touched, it kills.

Fixed a server crash. Fixed lags. Fixed staff. Added new secret.
Removed Music.

[$Money$]

Have you tired this one out yet?

[Core]

there's a version of this already on the server, this is just an updated version