Fixes the 'drone' sprite for borgs. The eyes are now actual eye sprites instead of attached to the base sprite. No more pumping 40 shots into a secborg and wondering why it won't die.

Adds option for medical module to use the medical drone sprite.
Adds sprite for surgery and mining.  Mining will no longer use a medical sprite (why???)

code/modules/mob/living/silicon/robot/robot.dm

@@ -249,7 +249,7 @@ var/list/robot_verbs_default = list(
 			module_sprites["Basic"] = "Miner_old"
 			module_sprites["Advanced Droid"] = "droid-miner"
 			module_sprites["Treadhead"] = "Miner"
-			module_sprites["Drone"] = "drone-medical"
+			module_sprites["Drone"] = "drone-miner"
 
 		if("Crisis")
 			module = new /obj/item/weapon/robot_module/crisis(src)
@@ -260,6 +260,7 @@ var/list/robot_verbs_default = list(
 			module_sprites["Standard"] = "surgeon"
 			module_sprites["Advanced Droid"] = "droid-medical"
 			module_sprites["Needles"] = "medicalrobot"
+			module_sprites["Drone" ] = "drone-medical"
 
 		if("Surgeon")
 			module = new /obj/item/weapon/robot_module/surgeon(src)
@@ -271,7 +272,7 @@ var/list/robot_verbs_default = list(
 			module_sprites["Standard"] = "surgeon"
 			module_sprites["Advanced Droid"] = "droid-medical"
 			module_sprites["Needles"] = "medicalrobot"
-			module_sprites["Drone"] = "drone-medical"
+			module_sprites["Drone"] = "drone-surgery"
 
 		if("Security")
 			module = new /obj/item/weapon/robot_module/security(src)