Cleanup some stuff

[benwiley4000]

Before we make too many new files I wanted to tidy things up a little bit.

Summary of changes:

• Removed all the teapot related stuff from the Pacman class and renamed it to Player - should be simple to swap in a new player model later without many further changes.
• Deleted an image file that wasn't being used.
• Moved a bunch of things into new subdirectories.
  • If you look at the diff for CMakeLists.txt you'll see where all the C++ files went.
  • I also created top-level subdirectories for models/ (.obj files) and shaders/ (.glsl files).
  • Note that this means several #include paths were updated to grab things from parent/child directories.

If you want to explore the edited file structure to get a better sense of it, go here.

[KNG-Scherezade]

Checked the adjustments. Looks good