HTML version of book fixed

Some people reported that the HTML version of my book was not printing
figures properly.  I have found the problem and corrected it.

Also, the book has nice coverage of the new 7.0 psql features.

    http://www.postgresql.org/docs/awbook.html

--
  Bruce Momjian                        |  http://www.op.net/~candle
  pgman@candle.pha.pa.us               |  (610) 853-3000
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