New features:
* When saving, a datestamp saved in the form and that of the file are
compared now; so, accidently saving over changes of other people is
not possible anymore (saving still needs file locking though, for
race conditions)
* if the directory "backup" exists in the data dir, pages are saved
there before a new version is written to disk
* Removed the "Reset" button from EditPage
* Added "Reduce editor size" link
* Added Latin-1 WikiNames (JürgenHermann ;)
* Speeded up RecentChanges by looking up hostnames ONCE while saving
* Show at most 14 (distinct) days in RecentChanges
* Added icons for common functions, at the top of the page
* Added a printing preview (no icons, etc.)
* Added bracketed (external) URLs
* Added support for quoted URLs ("http://...")
* Added styles for :visited links to CSS
* Embed image if an URL ends in .gif/.jpg/.png
* No markup detection in code sections
* Grey background for code sections
* Added handling for numbered lists
* the edit textarea now grows in width with the browser window
(thanks to Sebastian Dau�for that idea)
* Added page info (revision history) and viewing of old revisions
* Added page diff, and diff links on page info
* Added InterWiki support (use "wiki:WikiServer/theirlocalname"; the list
of WikiServers is read from "data/intermap.txt")
* Added "normal" InterWiki links
* Added "action=raw" to send the raw wiki markup as text/plain (e.g. for
backup purposes via wget)
Bugfixes:
* Removed an exception when saving empty pages
* Fixed bold nested into emphasis ('''''Bold''' Italic'')
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