Write README

.gitattributes

@@ -1 +0,0 @@
-demo.png filter=lfs diff=lfs merge=lfs -text

.gitignore

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 build/
 *.ff
 *.png
-!demo.png

README.md

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 # Batomorph
 
-Batomorph is a simple ray tracer, written in C23 for POSIX systems.
-
-![Demo rendering](demo.png)
-
-To build with CMake (there are no dependencies):
+This is a simple raytracer, written for POSIX systems in C23 with zero
+runtime dependencies (outside of the standard library).  To build with
+CMake:
 
 ```sh
 cmake -B build
@@ -12,11 +10,12 @@ cmake --build build
 ```
 
 You may want to adjust the `NTHREADS` definition in `src/render.c` to
-match your system.
+match your system for best performance.
 
-The demo programs (`build/demo` and `build/rand`) will write the
-rendered image in sRGB
-[Farbfeld](https://tools.suckless.org/farbfeld/) to `stdout`:
+When ran, the demo programs (`build/demo` and `build/rand`) will write
+the rendered image in sRGB
+[Farbfeld](https://tools.suckless.org/farbfeld/) to standard out.  For
+example:
 
 ```sh
 build/demo > out.ff           # Produce Farbfeld file
@@ -25,8 +24,3 @@ build/demo | feh              # View directly
 ```
 
 (Note that `ff2png` and `feh` are third-party programs)
-
-## License
-
-Batomorph is Copyright © Camden Dixie O'Brien, and is available under
-the Komorebi 2.0.0 license.  See [LICENSE.md](LICENSE.md) for details.