040000 tree 869d31d3ab50726a1fe765ee04e50317bfc653b9	architectureDocumentation
040000 tree beb093ad06c83cb07344382fad679ac8138b4851	howto
040000 tree 66999fe37270ec11c57b1cef3107dff5ba7919ce	images
040000 tree 615ae541d6b6acd80f3b3e9d8d7d644ff5006c9e	interfaceDocumentation