Videoconference plugin install script fails on subdirectory installs
On Chamilo installations using a subdirectory (i.e. www.chamilo.org/elearning/), the bbb plugin fails to link to the right directory.
In plugin/bbb/install.php and plugin/bbb/course_install.php, the link to the bbb plugin has to be modified from ../../plugin/bbb/start.php to ../plugin/bbb/start.php.
This is likely to make the "normal" (root directory) installs fail, so it has to be checked thoroughly before applying (make sure that, with this change, it works both for root directory and subdirectory installs).