docs: add build_all target and benchmark_only shortcut to Makefile, update README with version credits and build instructions

Makefile

@@ -21,12 +21,14 @@ build_borded_cpp:
 
 build_risspam:
 	@echo "Compiling 12bitfloat_risspam project."
-	cd 12bitfloat_rust/risspam && cargo run --release && cp target/release/risspam ../../
+	cd 12bitfloat_rust/risspam && cargo build --release && cp target/release/risspam ../../
 
 build_jest:
 	@echo "compiling jest_rust project"
 	cd jest_rust && cargo build --release && cp target/release/jisspam ..
 
+build_all: build build_py build_cpp build_borded_cpp build_risspam build_jest
+
 run: run_spam wl run_not_spam
 run_risspam: run_spam_risspam run_not_spam_risspam
 
@@ -59,9 +61,14 @@ publish:
 	@./publish risspam
 	@rm publish
 	@rm env.py
+
 benchmark:
 	-@rm -rf books 
 	@echo "Extracting books."
 	@tar -xzf books.tar.gz books/
 	@echo "Extracted books."
 	@python bench.py
+
+# Skip extracting books over and over
+benchmark_only:
+	@python bench.py