Groundwork for Viridian Pre-Gym

This map is fully functional but has a lot of bits to iron out, as well as a need for Gym Trainers. I'm also not wholly satisfied with Yujirou's team; maybe remove Eevee?

Yes, I designed an entire tileset for this. Fear me. Bow before me. Actually, don't, this was beyond rational thought.

Current issues;
- Yujirou's sprite doesn't work properly.
- Needs Gym Trainers (hell)
- Yujirou needs an event for being beaten, the refight, and more.

data/maps/objects/ViridianPreGym.asm

@@ -0,0 +1,13 @@
+ViridianPreGym_Object:
+	db $0 ; border block
+
+	def_warp_events
+	warp_event 5, 13, 7, VIRIDIAN_CITY
+	warp_event 4, 13, 7, VIRIDIAN_CITY
+
+	def_bg_events
+
+	def_object_events
+	object_event  5,  2, SPRITE_YOUNGSTER, STAY, NONE, 1 ; person, Yujirou
+
+	def_warps_to VIRIDIAN_PRE_GYM