-Moved PluginManager.php from classes/plugins/ to classes/
-Removed classes/plugins
-Updated plugin comment in the conf/config.inc.php
-Removed prefix plugin_ from PluginExample attributes and inside PluginManager
-Renamed plugin_index to name
-Renamed plugin_name to description
-Renamed get_plugin_index to get_name
-Changed attributes from public to private
-Moved plugin's instanciation from lib.inc.php to PluginManager contructor
-Validation if the plugins in the $conf['plugins'] exist
-Created $lang['strpluginnotfound'] and $lang['strpluginnotfoundcomplem'] in English and Portuguese-BR translation, to show an error when a plugin doesn't exist.
-Created get_functions method to get the plugins' functions
-Removed add_plugin_functions method
-Replaced $when to $hook in the execute_plugin_funtions code and comments
-Changes in the execute_plugin_funtions method

-Created do_action in the plugin_manager, to deal with plugins actions.
-Put some TODOs in the comments.
-Created a method show_page, that will show a simple PluginExamples page.
-Created plugin.php file to deal with plugins requests.
-Made some English corrections.

-Changed plugin_name in the lang files to strdescription
-Removed $description
-Remored $plugin_lang['plugin_toplink'] from translation files

-Changed config.inc.php
-Moved plugins/PluginExample to Example
-Refatored Example
-Fixed a bug in the Example plugin