add just enough to open a window w/ SFML
add .gitignore
add opengl clear screen
have a gtk window, but it doesn't seem to work
works, but uses gtk2
Add header comments
change to cmake for building, cleanup
improve cmake cmds
clean up
add test drawing
add graph data structs
got gtkmm 3 working by using newer ver of SFMLWidget
cleanup code
add 3rd dimension
get ready for shaders, add osl vector & matrix libs
add shader renderer. switch to glm instead of osl
switch to textures for coloring
add normals
show vertex norms
add ground plane