This patch adds events and a third plugin type, "action" plugins, to DokuWiki.

The patch doesn't include any event signalling, that will be added in later patches.

Action plugins are loaded before most Dokuwiki processing takes place and at the
same time are given the opportunity to register handlers (or hooks) to receive
specific dokuwiki events.

Other parts of Dokuwiki (e.g. templates and syntax plugins) can also register
handlers to receive events.

Any part of Dokuwiki can create and signal events, including templates and plugins.

This patch also revises the admin plugin class by making it an extension of a
new class, DokuWiki_Plugin. The DokuWiki_Plugin_Action class also extends this
new class.

Further details of events, their signalling and handling, and of action plugins will
be added to wiki.splitbrain.org in due course :-)

darcs-hash:20060414193737-9b6ab-f23d3d9b93e4c50a3ad97ced03eabc6c0363650b.gz

Now all filetype icons have the same style and work on light and dark
backgrounds. A test file was added to lib/images/fileicons/index.php

darcs-hash:20060412195703-7ad00-4d31a65788e8da0255ea6e064382595e8ae183ff.gz

Uses the first heading as the page name in the default template
if $conf['useheading'] is set. Updates tpl_pagetitle() so that it
can return this value.

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darcs-hash:20060410192459-7ad00-4212125ec31532656030b4d80984f6b45b5cf293.gz

Update default plugins to ensure they exit immediately
if not called from within Dokuwiki

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Tells standards compliant browsers that conditional requests for
CSS and JS need only be made once an hour. This should reduce page
display latency on some browsers.

Originated from the comment in this thread:
http://www.freelists.org/archives/dokuwiki/03-2006/msg00590.html

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The old pattern (left as a comment) allowed many PHP syntax errors
to be inserted into local.php for numeric values. This was breaking
the wiki... see bug #769.

This patch should eliminate the syntax errors by using a more restrictive
definition of numeric settings.

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Removes some link underlining that would appear around the 'Back to top' button.

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darcs-hash:20060322140525-283c4-54953a1954beba0e78c896610b33a6f3c953cbb6.gz

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darcs-hash:20060317203643-7ad00-9968464c2d9c41b1d99a6b16f415082f79af7a8d.gz

This changes the order of how Stylesheets are loaded, loading template
styles *after* the plugin styles to allow template authors to simply
override those styles.

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darcs-hash:20060315120248-05dcb-5d5d4e06d0074a687185131cda2000b914346e19.gz

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darcs-hash:20060314104843-9b6ab-538f5a0e750479e3b793162e01638c594a702bf9.gz

This adds a shadow effect to input fields and buttons for the default
template. It uses alphatransparency PNGs so it will may look bad for IE
in some cases. I think it adds some nice 3D effect making inputs and
buttons easily distictable without any complicated CSS markup.

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darcs-hash:20060312214049-a08f5-181fb8115f702521bab9f2e95700f8bd9ab7316d.gz

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darcs-hash:20060311194930-d5083-ebe898dedb3e906274a202c296bef78bededd1cf.gz

DokuWiki now automatically creates a draft file of the currently edited
page. In case of an editing interuption (eg. Browsercrash) the draftfile
can be continued later.

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darcs-hash:20060309185858-7ad00-12095015b88b010b3ce56fbec3ec261b26069e5a.gz

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darcs-hash:20060309000338-a08f5-57f9eb59c8e110bd35103c8dcc8a2cdf91d5cc68.gz

darcs-hash:20060307202053-7ad00-e3ca72efb3599a9a46011d0f9d57e9f1d26027b1.gz

the height of the top and bottom rows is now more flexible to respect the
different button height handling of browsers (konq)

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