bpublish v1.41   (c) 2002 Bret Victor
                   bret@ugcs.caltech.edu
                   http://www.ugcs.caltech.edu/~bret


CHANGELOG
---------
v1.41     5/2/02   - fixed a bug with the parent of interpolated blocks

v1.40    4/20/02   - added ${...} variable/block interpolation into strings,
                     redid entire quoting section of parser
                   - added image info caching
                   - added Date and Time core keywords
                   - modified syntax for Makevar, Setvar, and Var core
                     keywords to match Store/Retrieve syntax
                   - shuffled/renamed some functions.  Added keyword methods:
                     notify, fatal (used to be fatalkeyword, with slightly
                     different semantics), getblocktext, getimageinfo,
                     tryimageinfo, getimages, tryimages (used to be static
                     functions in Image package).  Now, all documented
                     functions are keyword methods.
                   - the above two changes could break existing code, but
                     no one has told me they are using this, so I don't care.
                     Nevertheless, I'll try not to break things anymore.
                   - command line switches can now be clustered, like you
                     would expect
                   - char position stated in keyword errors now points to the
                     beginning of the keyword rather than the end, which is
                     easier to interpret
                   - got rid of separate bpublish_image.pl file.  Main program
                     is now bpublish.pl, bpublish_keyword.pl, and bpk_core.pl.
                   - perl 5.6.0 is explicitly required.

v1.30    4/14/02   - added -e command line evaluation option
                   - added Store, Retrieve, and Unstore core keywords for 
                     persistent data ("poor man's database")
                   - added keyword methods:  addpropertytext, create,
                     getcreatetext, getparsetext, getuprefix, getsprefix
                   - bpublish.pl now uses /usr/bin/perl as the default Perl
                     path, for easier updating on most systems

v1.25    3/22/02   - finally ran the program through a profiler; found and
                     fixed the bottlenecks.  It's now about twice as fast.
                   - added -m command line option

v1.24    1/20/02   - added bpublish_image.pl, with routines to determine the
                     dimensions of an image file (no more dependence on
                     external programs!)
                   - added Swallow core keyword

v1.23     1/8/02   - added keyword methods:  tryproperties, trypropertytext,
                     tryinheritproperties, tryinheritpropertytext,
                     parse, parsefile
                   - tryimages now works in scalar context
                   - if the value of the prefix property is "", it is not
                     added to the prefix
                   - fixed problem with error message if include() file
                     didn't exist
                   - Evaluator::makevariable can provide initial value

v1.22   11/13/01   - added Early core pseudo-keyword

v1.21    11/9/01   - added square bracket quoting, improved quoting routines

v1.20   10/28/01   - first version that should have been publicly released
                   - allowed for dynamic parsing and evaluation of bpub code
                   - cleaned up engine and split into packages
                   - added core keywords:  Read, Bpub, Perl, Makevar, Setvar,
                     Var, Macro, Repeat, While, If
                   - added -v option
                   - lots of minor updates here and there
                   - wrote the frkin' manual

v1.12   10/15/01   - added morph() and getmorphtext() keyword methods

v1.11    10/7/01   - changed getprefix to use $prefixproperty package
                     variable instead of hardcoded keyword names

v1.10    9/27/01   - first publicly released version
                   - added stdin/stdout capabilities
                   - bpk packages found by globbing directory instead of
                     hardcoded filenames
                   - bpub files correctly loaded as blocks
                   - added help info, quiet mode, debug mode, comments, readme

v1.00       1/01   - original version