Merge pull request #176 from openitu/itu_submission_april_2024

ITU-T submission - April 2024 received consent.

Merge pull request #158 from openitu/itu_submission_january_2023

Received Consent at ITU-T SG12 meeting - January 2023

Merge pull request #155 from openitu/ITUsubmission_2022_noP50MNU

Package proposed for Consent (Friday June 17, 2022) - STL2022

Doc: Delete MANUAL.pdf (#143)

This is the 2009 manual. It is no longer necessary, especially because the manual is now automatically generated.

Imported ITU-T G.191 (03/10) aka STL2009.

https://www.itu.int/rec/T-REC-G.191/en