0.47    2009-05-??
        - rewrote PICA::SRUResponseParser and changed PICA::Source
        - cqlQuery and z3950Query of PICA::Source now return a PICA::Parser
0.46    2009-04-16
        - added PICA::Field->purged and PICA::Record->appendif
        - added PICA::Filemap and support of maps in picawebcat
        - normalize whitespace in subfield values
0.45    2009-03-05
        - added and improved error handlers in PICA::PlainParser
        - added support of webcat.conf config file in PICA::Store
        - started to fix XML and Unicode output mess
        - fixed bugs in PICA::Field (to_xml and fields without subfields)
        - improved parsepica and picawebcat scripts (installed as executables)
        - temporarily disabled Limit and Offset parameter
0.43    2009-02-10
        - updated webcat.pl command line client
        - added example pica2bibtex.pl
        - added limit parameter to PICA::Record->field / subfield
        - parsers and PICA::Record->new now support IO::Handle
        - added unAPI support in PICA::Source
0.4     2009-01-28
        - improved support of normalized PICA+ parsing
        - updated PICA::Store
0.3.9   2008-11-25
        - renamed PICA::Webcat to PICA::Store (more generic)
        - renamed PICA::Server to PICA::Source (more generic)
        - In PICA::Store fixed SOAP message and added connection type
        - simplified methods of PICA::Field
        - added 'sf' and 'f' shortcuts
        - added 'Offset' and 'Limit' parameter (PICA::Parser)
        - removed 'Strict' parameter (PICA::Parser)
        - removed special handling of empty records
0.3.8   2008-10-08
        - added PICA::Webcat, removed PICA::Tutorial
        - moved examples to example directory
        - removed PICA::Field->set_tag($tag), now tag($tag)
        - minor changes and bugfixes in the Parser
0.3.6   2008-03-27
        - added Z39.50 support to parsepica.pl
        - fixed Z39.50 client and parser
        - added better holding handling: local_records() and copy_records()
0.3.5   2008-03-17
        - added SRU support to parsepica.pl
        - Added Proceed-mode for parsers
        - exportable functions parsedata() and parsefile()
        - now also reads from zip files and raw dumpfiles
0.3.4   2008-03-06
        - added two more field syntax in PICA::Field
        - added Z39.50 example
0.3.2   2007-12-05
        - avoid memory leak in PICA::Server->getPPN (caused by SRUSearchParser->new)
        - renamed PICA::Record->fields() to PICA::Record->all_fields()
        - renamed PICA::Record->subfields() to PICA::Record->all_subfields()
        - added PICA::Field->copy() for cloning Fields
        - fixed several typos in the documentation
        - added another example with bin/gbvholdings.pl
0.3     2007-07-20
        - first public release
0.2     2007-04-03
        - first internal release