Minor - adding actions bar in course_edit.php
Improving course setting creation/edition. Now the infocours.php creates a key in the database if the setting does not exists.
Adding new settings documents_default_visibility_defined_in_course/documents_default_visibility.
Minor - removing whitespaces
Minor - format code
When uploading a file now the default visibility depends of the portal and course settings.
Minor - adding default visibility which is 'visible' if there are not changes in the DB.
Adding documents_default_visibility setting. Default visible.
Merge branch '1.9.x' of github.com:chamilo/chamilo-lms into julio6666