Add subdirectories to data/ similar to pokecrystal

Top level text/ is now solely for the former text/maps/ files, and other files are in their respective subdirectories in data/.

text/Route15Gate2F.asm

@@ -0,0 +1,24 @@
+_Route15GateUpstairsText_4968c::
+	text "EXP.ALL gives"
+	line "EXP points to all"
+	cont "the #MON with"
+	cont "you, even if they"
+	cont "don't fight."
+
+	para "It does, however,"
+	line "reduce the amount"
+	cont "of EXP for each"
+	cont "#MON."
+
+	para "If you don't need"
+	line "it, you should "
+	cont "store it via PC."
+	done
+
+_Route15GateUpstairsText_49698::
+	text "Looked into the"
+	line "binoculars."
+
+	para "It looks like a"
+	line "small island!"
+	done