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/celadon_diner.asm

@@ -1,24 +1,24 @@
-_CeladonDinerText1: ; 9df3f (27:5f3f)
+_CeladonDinerText1:: ; 9df3f (27:5f3f)
 	text "Hi!"
 
 	para "We're taking a"
 	line "break now."
 	done
 
-_CeladonDinerText2: ; 9df5d (27:5f5d)
+_CeladonDinerText2:: ; 9df5d (27:5f5d)
 	text "My #MON are"
 	line "weak, so I often"
 	cont "have to go to the"
 	cont "DRUG STORE."
 	done
 
-_CeladonDinerText3: ; 9df99 (27:5f99)
+_CeladonDinerText3:: ; 9df99 (27:5f99)
 	text "Psst! There's a"
 	line "basement under"
 	cont "the GAME CORNER."
 	done
 
-_CeladonDinerText4: ; 9dfc9 (27:5fc9)
+_CeladonDinerText4:: ; 9dfc9 (27:5fc9)
 	text "Munch..."
 
 	para "The man at that"
@@ -26,7 +26,7 @@ _CeladonDinerText4: ; 9dfc9 (27:5fc9)
 	cont "at the slots."
 	done
 
-_UnnamedText_491a7: ; 9e003 (27:6003)
+_UnnamedText_491a7:: ; 9e003 (27:6003)
 	text "Go ahead! Laugh!"
 
 	para "I'm flat out"
@@ -41,18 +41,18 @@ _UnnamedText_491a7: ; 9e003 (27:6003)
 	cont "more!"
 	prompt
 
-_ReceivedCoinCaseText: ; 9e07a (27:607a)
+_ReceivedCoinCaseText:: ; 9e07a (27:607a)
 	text $52, " received"
 	line "a @"
 	TX_RAM $cf4b
 	text "!@@"
 
-_CoinCaseNoRoomText: ; 9e090 (27:6090)
+_CoinCaseNoRoomText:: ; 9e090 (27:6090)
 	text "Make room for"
 	line "this!"
 	done
 
-_UnnamedText_491b7: ; 9e0a5 (27:60a5)
+_UnnamedText_491b7:: ; 9e0a5 (27:60a5)
 	text "I always thought"
 	line "I was going to"
 	cont "win it back..."