New release from sandbox

CMakeLists.txt

Makefile

README.md

data/data_txyz.txt

include/draw_utils.h

include/gfx.h

include/gfx3.h

include/gfx_ui.h

include/gfx_ui_config.h

include/gl2ps.h

include/imconfig.h

include/imgui.h

include/imgui_impl_glfw.h

include/imgui_impl_glfw_gl3.h

include/imgui_internal.h

include/linmath.h

include/misc_utils.h

include/mpc_utils.h

include/stb_rect_pack.h

include/stb_textedit.h