1.3.0 of Grenades and Elevators

- Explosive grenades have gotten a major upgrade, (borrowed code from fragmentation grenades).
- Box for explosive grenades lowered to 5 grenades per box instead of 7.
- Evidence locker moved to forensics area from detective's office. Body bags, latex gloves, and evidence bags moved to said locker.
- Low yield EMP grenades created including sprites. Box for them created (neither added to the map).
- Can now spawn from the elevator.

code/modules/client/preferences_spawnpoints.dm

@@ -38,6 +38,14 @@ var/list/spawntypes = list()
 	..()
 	turfs = latejoin_gateway
 
+/datum/spawnpoint/elevator
+	display_name = "Elevator"
+	msg = "has arrived from the residential district"
+
+/datum/spawnpoint/elevator/New()
+	..()
+	turfs = latejoin_elevator
+
 /datum/spawnpoint/cryo
 	display_name = "Cryogenic Storage"
 	msg = "has completed cryogenic revival"