nanotrasen to gato

Replaced most instances of Nanotrasen mentions into GATO, though I've kept some that have more sense to be kept as Nanotrasen (like nanotrasen marked stuff and such)

code/controllers/subsystem/shuttle.dm

@@ -268,7 +268,7 @@ SUBSYSTEM_DEF(shuttle)
 
 	if(!admiral_message)
 		admiral_message = pick(GLOB.admiral_messages)
-	var/intercepttext = "<font size = 3><b>Nanotrasen Update</b>: Request For Shuttle.</font><hr>\
+	var/intercepttext = "<font size = 3><b>GATO Update</b>: Request For Shuttle.</font><hr>\
 						To whom it may concern:<br><br>\
 						We have taken note of the situation upon [station_name()] and have come to the \
 						conclusion that it does not warrant the abandonment of the station.<br>\

code/controllers/subsystem/ticker.dm

@@ -560,7 +560,7 @@ SUBSYSTEM_DEF(ticker)
 
 /datum/controller/subsystem/ticker/proc/send_news_report()
 	var/news_message
-	var/news_source = "Nanotrasen News Network"
+	var/news_source = "GATO News Network"
 	switch(news_report)
 		if(NUKE_SYNDICATE_BASE)
 			news_message = "In a daring raid, the heroic crew of [station_name()] detonated a nuclear device in the heart of a terrorist base."