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/pokemon_tower_3f.asm

@@ -1,45 +1,45 @@
-_PokemonTower3BattleText1: ; 99776 (26:5776)
+_PokemonTower3BattleText1:: ; 99776 (26:5776)
 	text "Urrg...Awaa..."
 	line "Huhu...graa.."
 	done
 
-_PokemonTower3EndBattleText1: ; 99794 (26:5794)
+_PokemonTower3EndBattleText1:: ; 99794 (26:5794)
 	text "Hwa!"
 	line "I'm saved!"
 	prompt
 
-_PokemonTower3AfterBattleText1: ; 997a4 (26:57a4)
+_PokemonTower3AfterBattleText1:: ; 997a4 (26:57a4)
 	text "The GHOSTs can be"
 	line "identified by the"
 	cont "SILPH SCOPE."
 	done
 
-_PokemonTower3BattleText2: ; 997d6 (26:57d6)
+_PokemonTower3BattleText2:: ; 997d6 (26:57d6)
 	text "Kekeke...."
 	line "Kwaaah!"
 	done
 
-_PokemonTower3EndBattleText2: ; 997ea (26:57ea)
+_PokemonTower3EndBattleText2:: ; 997ea (26:57ea)
 	text "Hmm?"
 	line "What am I doing?"
 	prompt
 
-_PokemonTower3AfterBattleText2: ; 99801 (26:5801)
+_PokemonTower3AfterBattleText2:: ; 99801 (26:5801)
 	text "Sorry! I was"
 	line "possessed!"
 	done
 
-_PokemonTower3BattleText3: ; 9981a (26:581a)
+_PokemonTower3BattleText3:: ; 9981a (26:581a)
 	text "Be gone!"
 	line "Evil spirit!"
 	done
 
-_PokemonTower3EndBattleText3: ; 99831 (26:5831)
+_PokemonTower3EndBattleText3:: ; 99831 (26:5831)
 	text "Whew!"
 	line "The spirit left!"
 	prompt
 
-_PokemonTower3AfterBattleText3: ; 99849 (26:5849)
+_PokemonTower3AfterBattleText3:: ; 99849 (26:5849)
 	text "My friends were"
 	line "possessed too!"
 	done