040000 tree 87b1bc6b8ce9fcdd7410ebe21bafc605a5bdf944	build
040000 tree 94a0fff1b5aac78e203134e14211adee8329ccb6	build_rules
040000 tree 0b1e61144cbd90d262f23f40535a1c493d0b963f	dev
040000 tree 3d8cd843c68731adc4a6d8e63dbbe983bcfd0451	gui
040000 tree a41b34e3e8381bc036a4a43693378fc9e41eb246	package
040000 tree 087cb72513bec4d863fea116777065edea439ffc	test
040000 tree 544425a8f378f24fa9a142685fceeb9602d38754	tutorials