Standardize on American spellings.

Full internationalization would be much cooler, but that's never going
to happen.  Given that, this will at least prevent folks from constantly
having to look and switch between typing "armor" and "armour", depending
on which zone each item originated in, etc.

I could flip these either way, but a survey of the current state shows
that about 80% of the mixed cases use the American spellings, while 20%
use the British.  And, most words *only* exist in this data in their
American forms.  So, it seems the majority prefer these spellings.

In case anyone likes trivia:
* The most common mixed words in here were "armour" and "colour", each of
  which occured about half as often as "armor" and "color", respectively.
* The most British word in here was "theatre" (including other forms),
  which occured about twice as often as "theater".

This stanardizes all of these (and other forms of these same words):
* armour -> armor
* colour -> color
* favour -> favor
* honour -> honor
* civilise -> civilize
* centre -> center
* theatre -> theater
* defence -> defense
* offence -> offense
* realise -> realize

lib/world/wld/257.wld

@@ -1,6 +1,6 @@
 #25700
-Maris' Armoury~
-   You stand in Maris' Armoury, self proclaimed finest armoury in all Jareth.
+Maris' Armory~
+   You stand in Maris' Armory, self proclaimed finest armory in all Jareth.
 An ornate but servicable looking counter makes an 'L' shape around a door which
 appears to lead into a rear service and holding area.  Shields adorn the walls,
 all polished to a bright gleam, and a suit of armor stands attentively on a
@@ -75,7 +75,7 @@ You see the City Proper.
 ~
 0 -1 25705
 D3
-You see Maris' Armoury.
+You see Maris' Armory.
 ~
 ~
 0 -1 25700
@@ -1127,7 +1127,7 @@ adds to your lust for material wealth as you survey your surroundings.  All
 around you, the finest of all furniture and goods lay sattered haphazardly
 around, as if the owner of these items were not aware of their value.  In one
 corner, a chest heaped with coins lays on it's side, while in another, a rack of
-glowing, golden armour and weapons sits propped against the wall.  Your only
+glowing, golden armor and weapons sits propped against the wall.  Your only
 exit is to the west.
 ~
 257 524 0 0 0 0
@@ -1621,7 +1621,7 @@ map wall~
                         |      Vulcevic's                     |        Outfitters
                         |                                     |
         Jareth City  River St  The Bootery      Maris'  - Bourbon St. -  Maris'
-           Flats        |           |          Armoury        |         Weaponry
+           Flats        |           |          Armory        |         Weaponry
              |          |           |                         |            |
  < - -  Floris Ave - Square -  Floris Ave - Floris Ave - City Proper - Floris Ave...
                         |           |           |             |            |