Log Message:
Update to 2.16, provided by Mark E. Perkins in PR 30934:

2.16 January 6 2005 - Major

    + Rewrote and reinstated the write_comment() method to take
      account of the changes in the Excel 97+ comment format.
      Currently conflicts with insert_bitmap(), see docs.

    + Added standard styles such as comma, percent and currency.

    ! Changed write_url() methods to allow numbers or formulas
      as well as strings as the optional text.
      Requested by many.

    + Documented use of encoding flag in add_worksheet() to allow
      handling of UTF-16 sheet names.

    + Added encoding flag to merge_range() method to allow
      handling of UTF-16 strings. Requested by many.
      Added merge6.pl example program.

    + Added hide_zero() worksheet method to allow hiding of zero
      values in cells.

    + Added print_across() worksheet method to allow changing of
      the default print direction.

    + Added right_to_left() worksheet method to allow changing of
      the default worksheet direction in eastern versions of Excel.

    + Documented the Worksheet hide() method.

    + Added comments1.pl and comments2.pl example programs.

    + Added tests for the internal methods used by write_comment().

2.15 September 18 2005 - Minor

    ! Changed OLE container stream name from "Book" to "Workbook"
      for compatibility with some third party apps.
      Thanks Wieland Pusch and Kevin McMahon.

    ! Fixed bug that caused all worksheets to be selected in
      OpenOfficeOrg causing strange linking of data between
      Worksheets. Thanks  M. Brodbelt. See
      http://rt.cpan.org/NoAuth/Bug.html?id=14094
      http://www.openoffice.org/issues/show_bug.cgi?id=52955

    ! Changed file creation from end of program to the start of
      program in order to avoid race conditions and extra file
      creation on VMS.

    + Added optional user supplied results for formulas as a
      workaround for uncalcuated values in some non-Excel apps.
      Added formula_result.pl example of above.

2.14 May 9 2005 - Minor

    ! Fixed handling of Unicode font names.

2.13 April 20 2005 - Minor

    ! Made it a fatal error to use a merged format in a non-
      merged cell (and vice-versa). This is a temporary measure
      to prevent people from shooting themselves in the foot
      until the Format.pm code can be refactored.

    + Add 01_merge_formats.t test for above.

    + Added date_time tests.

2.12 March 22 2005 - Minor

    + Added further Unicode support. The following methods now
      handle uft8 in perl 5.8:
      add_worksheet()
      set_header()
      set_footer()
      set_font()
      set_num_format()

    + Added unicode_cyrillic.pl example.

    + Added 01_add_worksheet.t test.

2.11 September 30 2004 - Minor

    - Removed undocumented date_time handling from write() to
      avoid potential false matches.

    + Added add_write_handler() method to allow users to add
      their own data handlers to write().

    + Added 4 write_handler examples.

2.10 September 23 2004 - Major

    + Added chart support via external templates.
      Added Chart.pm and add_chart_ext() method to Workbook object.
      Added /charts directory with examples and documentation

    + Added write_date_time() worksheet method for writing dates
      and times in Excel date format.
      Added date_time.pl example.

    + Added automatic Unicode handling via utf8 in perl 5.8 and
      later. Thanks Mark Fowler.
      Added several unicode_*.pl examples in different encodings.
      Thanks to Sean Burke for the sample encodings.

    + Added write_to_scalar.pl example in order to answer frequently
      asked question about writing an Excel file to a scalar.

2.04 August 18 2004 - Minor

    ! Fixed handling of Euro symbol in num_format() strings.

    ! Renamed the Excel 5 style merge() format to the more correct
      center_across(). Updated examples accordingly.

    ! Added bug warning about using merge formats outside of
      merged ranges.

    + Fixed handling of doubled double quotes in formula strings.
      Thanks to a tip from merlyn.

    + The 2.xx versions are now compatible with MS Access. Removed
      statements to the contrary.

2.03 July 4 2004 - Minor

    ! Fixed bug that prevented column outlines from displaying.
      Thanks to Marc Rosenthal.

    ! Enhanced add_worksheet() name checking to exclude case-
      insensitive duplicate names.
      Thanks to James Wilkinson.

    ! Internal fix to number of rows in several (unseen) places.

    + Added mod_perl 2 example program from Matisse Enzer. Thanks.

2.02 May 28 2004 - Minor

    + Fixed internal version numbers to keep CPAN.pm happy.
      Thanks to David Dyck.

    + Minor changes to demo.pl merge5.pl and the html docs.

2.01 May 27 2004 - Major

    This version is a MAJOR revision to Spreadsheet::WriteExcel. The
    format of the Excel file that it produces has been updated from
    Excel 5 to Excel 97. This allows support for long, 32k character
    strings and Unicode.

    DUE TO THE MAJOR INTERNAL CHANGES IT IS RECOMMENDED THAT YOU TEST
    THIS UPGRADE FULLY BEFORE DEPLOYING IT.

    Also note that this version can be 1.5 to 2 times slower than
    previous versions and the write_comment() method has been
    temporarily removed. These issues will be fixed in later releases.

    + Changed the default Excel format to Excel 97.

    + Added support for strings up to 32767 character.

    + Added support for Unicode strings.

    + Improved speed in relation to pre-release versions.
      However, it is still slower than the 1.xx versions.

    + Improved OpenOffice.org support.

    + Added more examples: diag_border.pl, indent.pl,
      unicode.pl, unicode_japan.pl, unicode_list.pl

    + Changed the distro dir structure.

    - Temporarily removed write_comment() support since the Excel 5
      version isn't compatible with Excel 97+.

1.01 May 24 2004 - Minor

    ! Small non-bug fix to write_comment().

0.43 April 28 2004 - Minor

    ! Fixed longstanding bug where page setup features didn't
      show up in OpenOffice.org.

    ! Fixed localised @_ bug when using threaded perls.
      Thanks Tamas Gulacsi and Stephan Loescher.

0.42 August 26 2003 - Minor

    ! Fixed bug when using IO::Sclalar object as a filehandle.
      Thanks to Kyle R. Burton and David Robins.

    ! Fixed minor formula parser bug.
      Thanks Michael Braig

    ! Fixed handling of column sizing for widths less than 1
      unit (again). Thanks to Rubio (again).

    ! Failed new() returns undef instead of croak()ing as per docs.