Fixing PHP warnings.
Minor - fixing lang vars.
Fixing CSV report see BT#8490
Fixing default time
Merge branch '1.9.x' of ssh://github.com/chamilo/chamilo-lms into chamilo19
Minor - format code.
Show description on by default. see BT#8617
Minor - format code.
Fixing category session update see BT#8604
Adding format yyyy/mm/dd see BT#8606
Fixing language link see BT#8624
Upload ajax by default rename see #7244
Changing default upload document ajax to overwrite. see #7244
Minor - format code.
Minor - format code.
Fixing duplicating document see #7244
Minor - removing error_log
Fix double ampercent in logout link
Merge branch '1.9.x' of github.com:chamilo/chamilo-lms into 1.9.x
Minor fixing link see #7258