Updated some location/area names; collapsed Turnback Cave.

This had been done before, but some of the changes were lost when I
re-ripped Diamond and Pearl.

Also, Turnback Cave has been collapsed into seven sections rather than
four.  The previous change in particular ignored that the encounter
rates for the first three areas were lower than elsewhere.  I'm
conjecturing wildly, but I believe those first three are the actual
pillar rooms, and the following four identical groups are the groups of
rooms between the pillars.

pokedex/data/csv/locations.csv

@@ -9,7 +9,7 @@ id,generation_id,name
 8,4,Eterna Forest
 9,4,Fuego Ironworks
 10,4,Mt. Coronet
-11,4,Safari Zone
+11,4,Great Marsh
 12,4,Solaceon Ruins
 13,4,Victory Road
 14,4,Deserted Escape Path
@@ -19,9 +19,8 @@ id,generation_id,name
 18,4,Turnback Cave
 19,4,Snowpoint Temple
 20,4,Wayward Cave
-21,4,Ruins Maniac's Cave
-22,4,Ruins Maniac's Tunnel
-23,4,Pokemon Mansion garden
+22,4,Ruin Maniac Tunnel
+23,4,Trophy Garden
 24,4,Iron Island
 25,4,Old Chateau
 26,4,Lake Verity