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Version History:

 1.0 1999-08-27

 1.1 1999-08-29 improved documentation on the taxes
                commas in display

 1.2 1999-08-31 add total Tax and total Payable

 1.3 1999-09-01 use of getProvChoices

 1.4 2001-01-01 Québec and PEI PST isCompounded;

 1.5 2002-01-01 mention Labrador

 1.6 2002-04-23 moved to package com.mindprod.canadiantax

 1.7 2002-04-30 BC Sales tax bumped to 7.5%

 1.8 2004-06-06 add about box and version check, and Nunavut support.

 1.9 2006-02-05 make it easier to configure the initial province choices.
                pad files.
                change default to Ontario.
                coloured backgrounds
                convert to Swing

 2.0 2006-02-06

 2.1 2006-03-04 reformat with IntelliJ

 2.2 2006-06-04 new address

 2.3 2007-01-01 add PAD icon.

 2.4 2007-05-26 add spinner, drop in BC and Saskatchewan sales tax.
                BC sales dropped to 7% from 7.5%,
                Saskatchewan from 6% to 5%

 2.5 2007-06-07 tidy code

 2.6 2007-06-12 tidy code, dynamically switch between TVP and PST

 2.7 2007-09-08 add dual calc buttons, redo with double instead of long.

 2.8 2007-10-30 introduce named constants to make it easier to modify the tax tables.

 2.9 2007-12-31 GST drop 6 to 5%

 3.0 2008-03-03 correct spelling mistakes, display build and release date.

 3.1 2008-05-03 bigger window, hopefully making it work on Mac

 3.2 2008-05-07 make default province configurable.

 3.3 2008-05-15 change layout to make it work properly on the MacIntosh.

 3.4 2010-05-29 auto flip to new

 3.5 2010-07-07 display GST/PST breakout for HST.

 3.6 2010-07-28 display GST/PST/HST percentages

 3.7 2011-01-21 PST now payable out of province, seller's province irrelevant in determining tax.

 3.8 2011-03-24 Allow you to select asof date you want to see the taxes.

 3.9 2011-03-25 major rewrite. Move instructions to surrounding HTML.

 4.0 2011-03-25 release ability to calculate taxes for dates in the past.

 4.1 2011-06-14 add two promises of BC Liberal government to reduce HST on 2012-07-01 and 2014-07-01

 4.2 2012-01-13 add menubar, configurable L&F, update BC future PST history.

 4.3 2013-01-02 fix Quebec 2013-01-01 change.

 4.4 2013-02-03 add nickel-rounded total

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