eye_guide_on_image_buffers: ability to disable eye-guide in image buffers
grooveshark.js: update button selectors because website was updated
shell-command-on-url: docstring
favicon.js: use setAndFetchFaviconForPage for xulrunner 18 and above

nsIFaviconService::setAndLoadFaviconForPage was marked deprecated in
favor of mozIAsyncFavicons::setAndFetchFaviconForPage in xulrunner 21.
Since we already have a branch for xulrunner 18+ when the privacy
argument was added, and since favicon_service implements
mozIAsyncFavicons at least as far back as 18, I'm reusing that branch.
isearch_keymap: bind C-y to 'yank'
bindings/default/isearch.js: whitespace
key-kill-mode: a page-mode for blocking keyup and keydown events

Key-kill mode is a generic page-mode that can be used on any site for
blocking keyup and keydown events.  To use it, load the module and add
tests, like this:

    require("key-kill");
    key_kill_mode.test.push(build_url_regexp($domain = "github"));
    key_kill_mode.test.push(/\/\/.*slashdot\.org\//);
Debian package: Support XULRunner up to 22

Support for newer Xulrunners closes #699239

Also bump package version to today
Debian package: Bump Standards-Version to 3.9.4
Debian package: Upload as 1.0~~pre+git130407-1 to Debian Experimental
load_rc: avoid NS_ERROR_FILE_TARGET_DOES_NOT_EXIST in symlink test

Previously, if there was no rc, the symlink test on the rc path would
throw NS_ERROR_FILE_TARGET_DOES_NOT_EXIST.  This patch introduces a catch
for that error.

file_symlink_p: new util.  takes an nsIFile and returns the value of
file.isSymlink(), but also catches the error and returns false if the file
does not exist.  Note that this cannot be tested with file.exists(),
because that method automatically resolves symlinks.
facebook-mode: new page-mode

Provides fallthrough bindings for j, k, and return.
CREDITS: update
duckduckgo_anchor_keymap: remove binding of duckduckgo-follow-current (return)

Just use Conkeror's follow-current command.  Calling in to the content js
stopped working with a recent update of duckduckgo.com.

Resolves issue 446.

There may be more work to be done on this because there seem to be some
instances where follow-current does not work.  This fixes it for the main
links, at least.
reddit.js: make highlight stylesheet work on SSL
add variable to control whether key aliases should be chained