Minor - cosmetic changes.
Minor - cosmetic changes.
Minor - removing white spaces, formatting code.
Minor  - formatting code
Minor - formatting code
Minor - Formatting code
Fixing Link,  cosmetic changes
Minor - Formatting code.
Minor - Formatting code.
Adding multiple URL support for classes (user group) new DB table added "access_url_rel_usergroup" if table does not exists everthing works as usual. Option disabled for BC. see BT#6915
Minor - removing unused code
Merge branch '1.9.x' of github.com:chamilo/chamilo-lms into nuevo