In an older version of PHP a file_exists() call would issue a warning
when the file did not exist. This was fixed in later PHP releases. Since
we require PHP 5.3 now, there's no need to supress any error here
anymore. This might even give a minor performance boost.

Add the class .bounce to any element to let it bounce slightly for 2
seconds. This is useful to make the user aware of some element. Can be
combined with #scroll__here when a long list auto scrolls to a certain
item.

Added user*.less files to config

Simplifies modifying the cache via an action plugin

- includes, xhtml renderer adding 'node' class to <li> when it contains
  child list(s)

In stead use the type as provided to the function. Fixes #920

Move check after libraries are loaded, so that $conf['compression'] is not turned off in the case that gzopen doesn't exist while gzopen64 does exist, as inc/compatibility.php ought to have fixed.