Loading an obj file!

Finishing up:
	The difference between our program and the right program
		Struct packing turned out to be a non-issue
		For now anyway...

Alright, the textures:
	Texture coordinates would need to be in GPU memory	
		glVertexAttribPointer, round 2
	stbi_image, and loading it into memory
		Let's use this instead of SOIL
		Is that a problem on Windows?  Hope not
	After we have it
		glGenTextures
		glBindTexture
		glTexParameteri
	glTexImage2D
	Again, we can steal from hello_triangle_gui
	The fragment shader will have to load from a texture
		We can grab the Vulkan one and adapt it
		We'll have a "uniform sampler2D" for our texture
		Call texture function
	The vertex shader will have to pass the texture coordinates through
		Just like it did with color
	If we're using textures, we don't need "regular" colors
		Might as well save the memory and time
	Can we take a picture of the floor?
		I wonder if I brought a way to do that?

Skip if need be, but useful:
	Let's handle resize!
	Set a callback with glfwSetFramebufferSizeCallback
	In the callback:
		Update global width and height
		call glViewport to fix aspect ratio

Did any of this work?
	I'm hoping this can be the active learning:
		Save some other obj from Blender and load it in the game
		Faster:  I could give you an obj to start with	

If any of that worked:  Falling!
	We have to figure out if we're above an object