Comment fixes, clarification, and warning cleanup. (thanks Kyle) --Rumble

lib/misc/bugs

@@ -1,17 +0,0 @@
-Text       couldnt find 2nd floor's moongate in ultima~
-Body      couldn't find 2nd floor's moongate in ultima
-~
-Name      Neptune~
-Level     30
-Room      55524
-Flags     0 0 0 0
-End
-Text       still about the 2nd moongate in ultima~
-Body      I found that there's a trigger in some room that handles the command
-"open shelf" --  there should be a hint somewhere in the descriptions.
-~
-Name      Neptune~
-Level     30
-Room      55571
-Flags     0 0 0 0
-End

lib/world/wld/555.wld

@@ -595,7 +595,7 @@ D3
 ~
 0 0 55533
 E
-shelf shelves bookshelf bookshelves~
+shelf shelves bookshelves bookcases~
    Secret Door: Open Shelf
 ~
 S
@@ -1298,22 +1298,22 @@ D0
 You see trees.
 ~
 ~
-0 0 55570
+0 0 55576
 D1
 You see trees.
 ~
 ~
-0 0 55576
+0 0 55572
 D2
 You see trees.
 ~
 ~
-0 0 55572
+0 0 55581
 D3
 You see trees.
 ~
 ~
-0 0 55581
+0 0 55570
 S
 T 55571
 #55572