Changes to BibStuff distribution for release 2.04.

The distribution is now configured with the WRPRC2 files.

bibpick application added, for yanking records out of a bib file by number.

BibRead() has been reorganized to accommodate a generalization of the
record-construction machinery.  It was split into initialization, text
collection, and field characterization phases, then most of this machinery
was moved out into a new function, BibGet().  BibGet accepts as a parameter
a pointer to a text collection function.  BibRead() now simply calls BibGet()
with a collection function specific to file input.  Other functions can now
easily be constructed which take input from other sources and return a
record with all the associated data structure completely set up.  (E.g., if
you're reading a record from a network connection where lines are returned
terminated by CRLF instead of simply LF, or if you happen to have the
complete text of a record stored in a memory buffer, and want to turn it
into a full-blown BibRec).  The downsize, of course, if that the increased
generality is obtained at the cost of increased inefficiency.

BibRead() also had a bug such that if the length of a line of the record
text was a multiple of 1024, the record would be read incorrectly.

BibPasteText() now requires a length argument for the string to be pasted
in, rather than a null-terminated string.  This is more general, but
incompatible with previous distributions.  None of the included applications
used it, though, so perhaps the impact is minimal.

In h/bibcmp.c, apps/bibcmp.c, and apps/BibHist.c, renamed charmap to
bibCharMap to eliminate conflict with charmap symbol already defined in
Solaris library.