Get rid of globals.asm. Use ::s to export labels between objects.

globals.asm was a hack that:
- gave rgbasm an extra 100k lines to read
- increased reliance on the python preprocessor
- made the makefile a mess
- gave object creation an extra step
- wasn't even necessary

This speeds up build time by at least a third.

text/maps/route_18.asm

@@ -1,57 +1,57 @@
-_Route18BattleText1: ; 917a1 (24:57a1)
+_Route18BattleText1:: ; 917a1 (24:57a1)
 	text "I always check"
 	line "every grassy area"
 	cont "for new #MON."
 	done
 
-_Route18EndBattleText1: ; 917d1 (24:57d1)
+_Route18EndBattleText1:: ; 917d1 (24:57d1)
 	text "Tch!"
 	prompt
 
-_Route18AfterBattleText1: ; 917d7 (24:57d7)
+_Route18AfterBattleText1:: ; 917d7 (24:57d7)
 	text "I wish I had a"
 	line "BIKE!"
 	done
 
-_Route18BattleText2: ; 917ed (24:57ed)
+_Route18BattleText2:: ; 917ed (24:57ed)
 	text "Kurukkoo!"
 	line "How do you like"
 	cont "my bird call?"
 	done
 
-_Route18EndBattleText2: ; 91816 (24:5816)
+_Route18EndBattleText2:: ; 91816 (24:5816)
 	text "I"
 	line "had to bug you!"
 	prompt
 
-_Route18AfterBattleText2: ; 91829 (24:5829)
+_Route18AfterBattleText2:: ; 91829 (24:5829)
 	text "I also collect sea"
 	line "#MON on"
 	cont "weekends!"
 	done
 
-_Route18BattleText3: ; 9184f (24:584f)
+_Route18BattleText3:: ; 9184f (24:584f)
 	text "This is my turf!"
 	line "Get out of here!"
 	done
 
-_Route18EndBattleText3: ; 91872 (24:5872)
+_Route18EndBattleText3:: ; 91872 (24:5872)
 	text "Darn!"
 	prompt
 
-_Route18AfterBattleText3: ; 91879 (24:5879)
+_Route18AfterBattleText3:: ; 91879 (24:5879)
 	text "This is my fave"
 	line "#MON hunting"
 	cont "area!"
 	done
 
-_Route18Text4: ; 9189d (24:589d)
+_Route18Text4:: ; 9189d (24:589d)
 	text "ROUTE 18"
 	line "CELADON CITY -"
 	cont "FUCHSIA CITY"
 	done
 
-_Route18Text5: ; 918c3 (24:58c3)
+_Route18Text5:: ; 918c3 (24:58c3)
 	text "CYCLING ROAD"
 	line "No pedestrians"
 	cont "permitted!"