Add xulrunner 25 support
webjump.js: update stumpwmwiki webjump

The stumpwmwiki was moved to GitHub a while ago.
contrib/art/conker.svg, outline.svg: better 'string'
Debian: Add support for xulrunner-26.0
Debian: Switch default xulrunner dependency from 17 to 24

i.e. follow Debian Unstable and make the latest ESR release the
default xulrunner dependency.
help/help.html: rewording

Use the word 'window' instead of 'frame'.  We switched terminology long
ago.
scroll-top-left: fix for xulrunner >= 23

resolves issue450 (see http://bugs.conkeror.org/issue450 for details).
feedly-mode

Implement a page-mode for cloud.feedly.com.
CREDITS: update
Debian package: mention that issue 450 fixes debian bug report #726245
contrib/man/conkeror.1: update man page
CREDITS: update
opensearch_description.completer: do not require hitcount in XML results

The google opensearch webjump has been failing, because google's search
completions service no longer provides the hitcount in their XML results.
coroutine.js: use 'yield undefined' instead of 'yield'

XULRunner 25 issues a style warning about this.  The 'yield' keyword
without a value is deprecated, for some good reason, I'm sure.
completions_tree_view.getCellProperties: fix for XULRunner >= 22

Conkeror would issue errors like the following to the terminal when
running on XULRunner 22 or later:

    Console error: [JavaScript Error: "TypeError: props is undefined"
      {file: "chrome://conkeror/content/minibuffer-read.js" line: 69}]
      Category: chrome javascript

The behavior of getCellProperties was changed in XULRunner 22, so this
patch is an update for that change.
Merge remote-tracking branch 'upstream/master'
xulrunner-26-update