040000 tree f295b86499c33d3a00cad365220cf0cb3da7430d	01how-to-contribute
040000 tree 3dcdf276dc78ed518184a4805f319e4e88c33317	02code-guidelines
040000 tree dce4ddac6d89cdf5b95d403916a02c8ae48945f8	03pull-request
040000 tree bea39b9149b4eb13fb53ab3bccce987461e652a3	04release-manual