16.3.1 (2024-03-24)
	- Updated documentation and licensing information.
	- Update TCPDF
	
16.2.0 (2024-03-18)
	- Update TCPDF

16.1.0 (2023-11-30)
	- Format code.
	- Requires PHP 8.0+
	
15.0.3 (2023-06-13)
	- Minor fixes.

15.0.2 (2023-06-13)
	- Updated spanish translation.

15.0.0 (2022-12-17)
	- Updated database tce_tests.test_repeatable column to support numeric values.
	- Test repeatability can now be limited to a fixed value.

14.9.0 (2022-12-17)
	- Support for custom authentication methods.

14.8.6 (2022-12-17)
	- Update TCPDF library.

14.8.5 (2021-08-05)
	- Security patches.
	
14.5.0 (2020-12-30)
	- New custom mobile theme.

14.3.0 (2020-06-12)
	- Various security fixes.

14.0.0 (2017-04-22)
	- Change password hashing algorithm.
	- NOTE: all passwords have to be reset!

13.3.0 (2016-09-06)
	- Fix undefined K_USRREG_PASSWORD_RE issue.

13.2.1 (2016-08-22)
	- Fix fatal error in tce_db_dal.php.

13.2.0 (2016-08-21)
	- The K_USRREG_PASSWORD_RE constant was added in shared/config/tce_user_registration.php to set the regular expression used to filter input passwords.
	- An error with the C_mailer class was fixed.
	- Automatic code formatting.

13.1.1 (2016-03-15)
	- Fix a critical bug introcuced in version 13.0.0 that prevent storing the correct answers.

13.0.1 (2015-12-12)
	- Fix a bug related to PDF email attachments.