duplicate words removed from various documentation files

The magic command is:

grep " \([[:alpha:]]\+\) \1[[:space:]]" \
`find . -name "*.doc" -or -name "*.tex"`

but the output still needs to be filtered by eye, since many duplicates
occur in embedded math and ML.

Duplicates in the Italian manual approved by Domenico Masini.

Typography: correct spacing after i.e. and e.g.

Remove trailing whitespace in a bunch of .tex files.

Have "modernised" the manuals.

1. By default it now uses pdflatex. Postscript can still be generated
with "make ps".

* Authors should not use pstricks - it doesn't work with pdflatex.
* The commuting diagrams in the tutorial have been redone with
XP-pic -- with much less code.
* Other figures can be included with "\includegraphics", which is provided
by the graphicx package. Just make sure you upload EPS and PDF versions
of the diagrams.
* The Covers directory and old logos have been removed -- they weren't
maintainable. (Have tarted up the title.tex pages.)

2. The make files have been updated and cleaned up. There is
now "make clean" option in $HOLDIR/Manuals.

* As a side note, I noticed that a call to "make" in $HOLDIR/Manuals didn't
do anything on Mac OS X. I had to do "make -B".

3. Have eliminated font substitution errors.

* Don't include the charter.sty package - the font is now changed
in LaTeX/layout.sty. This avoids changing the \tt font, which
causes problems with \section{\texttt{stuff}}.
* Left and right braces in \tt font can be a problem. \{ and \} give
maths font, which is fine in places. \verb%{}% will work but
\verb can't be used in certain places (inside another command).
Have added \lb and \rb to LaTeX/commands.tex. These are just
\char'173 and \char'175 and can be used anywhere.

4. Have commented out the mucking about with page numbering.

* This means that if you do a goto page N (in Acrobat, Preview.app etc.)
then you go to page N of the main text. (Stops folks having to add
an offset to entries in the index.)

5. Have made things more compatible with amsmath.

* The environment "boxed" (LaTeX/commands.tex) has been renamed to "holboxed".
* Have changed "\over" to "\frac".
* amsmath is turned on in the Logic manual, mainly to get text subscripts
typesetting better.

6. Have removed a bunch of hbox (and other) warnings.

* Don't do "\begin{session}\begin{hol}\begin{verbatim}...", do
"\begin{session}\begin{verbatim}..." instead.
* Don't use "\begin{hol}\begin{verbatim}..." is item lists.
Instead just do "\begin{verbatim}".
* Have done some small text edits - hopefully these are okay.
* A few more warnings remain and there's not much that can be done
about underfull vboxes -- short of going with "\raggedbottom".

7. Have made Doc2TeX and reference.tex used fancyvrb, This means the
font size can be set to \small globally. Have also removed the
\samepage directive -- a few bad breaks are better than having
material bigger than the size of the page.

Moved HolBdd and holCheck out of Description, as they are no longer in src. make will now build them as standalone documents.

* Added HolSatLib and HolBddLib sections to Description.
* Changed Description to use bibtex for bibliography.

Fixed suspect typo flagged by MN (thanks).

Some typographic clean-ups. In particular, replace
\HOLb (defined to be \HOL\,)
with \HOL{}. The former didn't do nice inter-word spacing, and also looked
ugly when followed by punctuation. Similarly with \hc. Flagged a couple
of non-\hc occurrences of holCheck (note lower-case). Some other minor
changes.

HolCheck section added to Description.