Merge pull request #48 from chamilo/1.9.x

1.9.x
Merge pull request #49 from chamilo/1.9.x

1.9.x
Fixing access error messsage -refs #6768
Remove disabled teachers from list of session course coaches - refs BT#7968
Fixing bug sending notification -refs #6909
Merge pull request #263 from ycastillo/fixes.6909

Fixes.6909
Merge pull request #262 from ycastillo/yoselyn.6768

Fix error page when clicking on an exercise's direct link and the exercise doesn't exist - refs #6768
Merge pull request #50 from chamilo/1.9.x

1.9.x
Adding api_get_path() in URLs, replacing global values, format code.
Fixing PHP warnings.
Merge branch '1.9.x' of ssh://github.com/chamilo/chamilo-lms into chamilo19
Replacing globals.
Format code.
Replacing ResultSet with classic Database:: functions

ResultSet does not exists in chamilo 1.10 in favour of Doctrine.
Replacing datepickerdate with date_picker element
Adding @deprecated to old functions.
Fixing start_date default values.
Minor - Updating docs.
Fix issues with YouTube embedding - refs BT#7930
Fix issues with YouTube embedding - refs BT#7930