Zwiki

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* sample wiki: included latest DTML features from ZWikiWeb -
SearchPage, JumpTo, AnnoyingQuote, separate edit page, etc etc.

* multiple markup formats - structured text,
classic wiki (TresSeaver), HTML/DTML, plain text

* better international character handling (AlexandreRatti)

* LFCR line-terminations are converted to LF

* tweaked editform layout

* source cleanup

* renamed default_wiki_page to standard_wiki_page for consistency

* ! at the beginning of a line protects it from wiki translation

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* now checks for valid DTML & reports errors

* no longer requires "view management screens" permission

* tweaked wikilink regexp

* new icon

* misc fixes

* standard_wiki_header, standard_wiki_footer & default_wiki_page
have built-in defaults; define as dtml methods to override

* sample wiki: AllPages is a zwikipage; pagenames with spaces
are listed properly

* sample wiki: added a RecentChanges page

* sample wiki: simplified

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* initial development release