Menu api

This adds a api that does that plugins can add menu to minepeon, without
editing the menu.php. this is good because if a new update is added,
then the code line that the plugin added isn't deleted...
dont list api folder

This does that it not listing the api folder
Remove plugins menu on remove plugins

This remove the menu that the plugin added when is was added... (when
you remove a plugin)
Merge pull request #12 from mariogrip/master

Menu api