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/mob/267.mob

@@ -227,7 +227,7 @@ the Grand Dragon of Terror~
 The Grand Dragon of Terror rests, curled around a giant pillar in the temple.
 ~
    This dragon is just beautiful.  Its scales are mirror-like in polish.
-Beautifully-coloured wings protrude from the sides.  Unlike most dragons, this
+Beautifully-colored wings protrude from the sides.  Unlike most dragons, this
 actually resembles a snake--except that it's about one-hundred times larger,
 and certainly is more dangerous.  Sharp teeth extend from the mouth, and wisps
 of smoke curl from its nose.  It looks at you with infinite intelligence and a