Collaborator on SPHinXsys code developing

[Xiangyu-Hu]

Welcome to be a collaborator on SPHinXsys code developing!
For this, you can request me send an invitation to your github account.
After you accept the invitation, you will be on the list of collaborators and shown on SPHinXsys github main page.
Please provide real name to your account so that I will know with who I am working with.
As a collaborator, you are able to add branch, become a reviewer for the pull request and be referred in issues, discussion, etc.

The workflow of code developing can be described as follow:

If you want work by your own, you can fork SPHinXsys to your github account.
Note that all forks of SPHinXsys will be public according the rule of github.

If you do not want publish the code developed with me before its is considered as finished,
I can prepare a private SPHinXsys repository and you can set it as a upstream of your fork.
So that, after the code is finished in the private repository,
you can publish it from your own fork after pulling from such upstream.
Certainly, a pull request to the main SPHinXsys repository can be done from the fork too.

As collaborators, we will discuss the issues and progress of the coding using github pages on issue,
draft pull request etc. (also those in private repository) to make sure all discussions are well documented.

Please comment after this announcement so that we can modify the workflow
and make the collaboration more efficiently.