This is the repository for A3 Code. To get a copy of the code will need to have git installed. If you are on a Mac or Linux system this will be pre-installed you can access it by opening a terminal and typing git. If you are on windows you will need to download it from here
A simple how to for using the Command Line git can be found here
The commands you will need our
git clone <URL> # The url of the repository you are cloning
git pull origin master # Pull down changes from remote repository
git add . -A # Add changes to local repository
git commit -m "<Your message>" # Commit to local repository with a message
git push origin master # Push local changes to remote repository
A list of graphical git clients can be found here, if you are determined to use a graphical one of the CLI I would recommend the github one.