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/blues_house.asm

@@ -1,41 +1,41 @@
-_DaisyInitialText:
+_DaisyInitialText::
 	text "Hi ",$52,"!"
 	line $53," is out at"
 	cont "Grandpa's lab."
 	done
 
-_DaisyOfferMapText:
+_DaisyOfferMapText::
 	text "Grandpa asked you"
 	line "to run an errand?"
 	cont "Here, this will"
 	cont "help you!"
 	prompt
 
-_GotMapText:
+_GotMapText::
 	text $52," got a"
 	line "@"
 	TX_RAM $CF4B
 	text "!@@"
 
-_DaisyBagFullText:
+_DaisyBagFullText::
 	text "You have too much"
 	line "stuff with you."
 	done
 
-_DaisyUseMapText:
+_DaisyUseMapText::
 	text "Use the TOWN MAP"
 	line "to find out where"
 	cont "you are."
 	done
 
-_BluesHouseText2:
+_BluesHouseText2::
 	text "#MON are living"
 	line "things! If they"
 	cont "get tired, give"
 	cont "them a rest!"
 	done
 
-_BluesHouseText3:
+_BluesHouseText3::
 	text "It's a big map!"
 	line "This is useful!"
 	done