#29 There is no contributor guide

We need to have contributor guidelines in place to address potential problems with contributions and how to contribute to the project. Example issue : https://gogs.librecmc.org/libreCMC/libreCMC/pulls/28

https://gogs.librecmc.org/libreCMC/libreCMC/src/v1.4/docs/How%20To%20Submit%20A%20Change%20To%20This%20Wiki.md