well, we need a version control system such as Subversion, downloadable
here.
Also some tutorials for those who are new to cloud-based programming:
http://www.clear.rice.edu/comp314/svn.htmlhttp://aymanh.com/subversion-a-quick-tutorialIt's very basic, we have a cloud online, it has the source code in it, and every developer can access and modify that source code if permitted. There are just a bunch of commands for each task such as adding files, updating the repository (the central place which holds the source files), and time travel! (there will be a new revision everytime each developer updates the repository, and we can change back to previous versions if the new one has some nasty bugs!)
I can get the cloud if you want, or you can do it yourself
Here, Here or
Here.