Added docs for glob

Doc/lib/libglob.tex

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+\section{Standard Module \sectcode{glob}}
+\stmodindex{glob}
+\renewcommand{\indexsubitem}{(in module glob)}
+
+The \code{glob} module finds all the pathnames matching a specified
+pattern according to the rules used by the \UNIX{} shell.  No tilde
+expansion is done, but \verb\*\, \verb\?\, and character ranges
+expressed with \verb\[]\ will be correctly matched.  This is done by
+using the \code{os.listdir()} and \code{fnmatch.fnmatch()} functions
+in concert, and not by actually invoking a subshell.  (For tilde and
+shell variable expansion, use \code{os.path.expanduser(}) and
+\code{os.path.expandvars()}.)
+
+\begin{funcdesc}{glob}{pathname}
+Returns a possibly-empty list of path names that match \var{pathname},
+which must be a string containing a path specification.
+\var{pathname} can be either absolute (like
+\file{/usr/src/Python1.4/Makefile}) or relative (like
+\file{../../Tools/*.gif}), and can contain shell-style wildcards.
+\end{funcdesc}
+
+For example, consider a directory containing only the following files:
+\file{1.gif}, \file{2.txt}, and \file{card.gif}.  \code{glob.glob()}
+will produce the following results.  Notice how any leading components
+of the path are preserved.
+
+\begin{verbatim}
+>>> import glob
+>>> glob.glob('./[0-9].*')
+['./1.gif', './2.txt']
+>>> glob.glob('*.gif')
+['1.gif', 'card.gif']
+>>> glob.glob('?.gif')
+['1.gif']
+\end{verbatim}