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_4f.asm

@@ -1,44 +1,44 @@
-_PokemonTower4BattleText1: ; 99869 (26:5869)
+_PokemonTower4BattleText1:: ; 99869 (26:5869)
 	text "GHOST! No!"
 	line "Kwaaah!"
 	done
 
-_PokemonTower4EndBattleText1: ; 9987d (26:587d)
+_PokemonTower4EndBattleText1:: ; 9987d (26:587d)
 	text "Where"
 	line "is the GHOST?"
 	prompt
 
-_PokemonTower4AfterBattleText1: ; 99892 (26:5892)
+_PokemonTower4AfterBattleText1:: ; 99892 (26:5892)
 	text "I must have been"
 	line "dreaming..."
 	done
 
-_PokemonTower4BattleText2: ; 998b0 (26:58b0)
+_PokemonTower4BattleText2:: ; 998b0 (26:58b0)
 	text "Be cursed with"
 	line "me! Kwaaah!"
 	done
 
-_PokemonTower4EndBattleText2: ; 998cc (26:58cc)
+_PokemonTower4EndBattleText2:: ; 998cc (26:58cc)
 	text "What!"
 	prompt
 
-_PokemonTower4AfterBattleText2: ; 998d3 (26:58d3)
+_PokemonTower4AfterBattleText2:: ; 998d3 (26:58d3)
 	text "We can't crack"
 	line "the identity of"
 	cont "the GHOSTs."
 	done
 
-_PokemonTower4BattleText3: ; 998fe (26:58fe)
+_PokemonTower4BattleText3:: ; 998fe (26:58fe)
 	text "Huhuhu..."
 	line "Beat me not!"
 	done
 
-_PokemonTower4EndBattleText3: ; 99916 (26:5916)
+_PokemonTower4EndBattleText3:: ; 99916 (26:5916)
 	text "Huh?"
 	line "Who? What?"
 	prompt
 
-_PokemonTower4AfterBattleText3: ; 99927 (26:5927)
+_PokemonTower4AfterBattleText3:: ; 99927 (26:5927)
 	text "May the departed"
 	line "souls of #MON"
 	cont "rest in peace..."