How to use Pear Libraries inside plugins

This is a proposal for a standard way to include Pear libraries in plugins, so the structure can be shared by other plugins.

Create a “pear” (all small caps) directory inside the “plugins” directory.
Put the Pear package(s) inside the “pear” folder, following the Pear structure.
Add the following code to the very beginning of the plugin file (this will add the plugins/pear directory to PHP's include path, so the Pear classes will be found anywhere):

<?php
set_include_path(get_include_path() . PATH_SEPARATOR . $DIR_PLUGINS . 'pear');

Require the library inside methods using require_once, right before the Pear class is called. Example:

...
require_once 'Pager/Pager.php';
$pager = Pager::factory($this->pager_options);
...