The Git hub code will be updated with bug fixes and any big changes to the code. It's found under the MIT Licensing so you can copy and use the code with mention of where you code any of the base code from.
This is the Arduino code for Cela (Internal Version). Again the full code can be downloaded from the GitHub Repos
To see and have access to the Max and M4L code please check out the github as it will have the required files uploaded there.