Add error diffusion

Author: kmgx

.gitignore

@@ -1,10 +1,10 @@
 # Generated by Cargo
 # will have compiled files and executables
-/target/
+**/target/
 
 # Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
 # More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
+**/target/Cargo.lock
 
 # These are backup files generated by rustfmt
 **/*.rs.bk