Fixing po errors
Updating es/fr po files.
Minor - removing unused code
Merge branch 'master' of github.com:chamilo/chamilo-lms
Fixing function api_is_allowed_to_create_course() admin has all permissions.
Adding date.timezone validation.
Checking PPH version only during installation.
Managing PDOException, adding translator as a dependency in the template class.
Adding Installation validations.
Fixing es.po errors.
Minor - adding docs.
Export to gettext command: avoided CRLF creating parse errors in resulting gettext files - refs #4467
Merge branch 'master' of github.com:chamilo/chamilo-lms
Export to gettext command: more fixes to CRLF and added commented section to get all languages at once - refs #4467
Fixed default English variables in conversion to gettext - refs #4467