2007-09-09 ZShogi-0.5.1
	- added last-modified time to http header
	- added http status 304 by checking If-Modified-Since

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2007-07-16 ZShogi-0.5.0 released
	- changed index_html method to return xml
	- added some public methods for www

2006-10-06
	- changed ImageFile to App.ImageFile in __init__.py

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2006-04-09 ZShogi-0.1.3 released
	- added transparent background
	- fixed some bugs

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2005-04-24 ZShogi-0.1.2 released
	- fixed if request has no form, judgement error occurred
	- added require PIL (python-imaging) >= 1.1.5
	- added bKGD chunk block to png images

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2005-02-26 ZShogi-0.1.1 released
	- added a set of large size pieces and board

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2004-12-29 ZShogi-0.1.0 released
	- released new experimentally.
