Some cleanup, reorganization, preparation for naive BDPT

Author: CulDeVu

Diff for: .gitignore

@@ -1,7 +1,9 @@
 build/*
 models/*
-include/glm/*
-include/embree2/*
+external/glm/*
+external/embree2/*
+lib/*
+.vscode/*
 
 *.ppm
 *.dll

Diff for: README.md

@@ -1,21 +1,24 @@
 Albedo
 ===
 
-A community spectral CPU path tracer, made by the Graphics Programming Discord.
+A community spectral CPU path tracer, made by the Graphics Programming Discord. This is designed to be a path tracer that people can learn from.
+
+Please contribute. If this project doesn't make progress at least once a year, deccer bulies me 😢. Help stop the violence.
+
+![](thumbnail.png)
+(inb4 "all I see is noise")
 
 To-do List
 ---
 
 - Ray tracer
-    - Embree or some sort of custom ray tracing kernel
     - BDPT, MIS, and much much more!
     - More and better sampling strategies
     - Simple lenses and film
     - Tonemapper
     - Post-process denoiser
 - Models and materials
-    - Add support for loading 3D models
-    - Use a better material system than the obj material system
+    - Use a better material system than bell curves
     - Microfacet importance sampling
 - System
     - Some UI showing current render/progress