Define a constant WORDLEN. Always use this constant and NWORD where
appropriate.
Use NWORD - 1 in battlestar.c to avoid off-by-one error.
Increment wordnumber after the INVEN verb to allow it to be followed
by a comma and other actions.
Avoid overflowing elements of the words array if input words are too
long.
Parse "," as AND except when followed by a verb, to allow such
constructions as "take foo, bar, and baz". Trim AND AND which may
occur from the ", and" in such a list.
Avoid crashes from EVERYTHING in the wrong place by moving it to the
start of OBJECT AND EVERYTHING and NOUNS AND EVERYTHING sequences, and
trimming EVERYTHING AND EVERYTHING.
