Made cross-compiling easier to me

.gitignore

@@ -1,2 +1,3 @@
 /target
-.idea/
+/.idea
+/release

Makefile

@@ -0,0 +1,19 @@
+all:
+	cargo build --release && mv ./target/release/mandelplot .
+
+cross:
+	rm -rf release/
+	mkdir release
+	mkdir release/mandelplot_linux_amd64
+	mkdir release/mandelplot_windows_amd64
+	cp LICENSE release/mandelplot_windows_amd64/
+	cp LICENSE release/mandelplot_linux_amd64/
+
+	cargo build --release --target=x86_64-unknown-linux-musl
+	mv ./target/x86_64-unknown-linux-musl/release/mandelplot ./release/mandelplot_linux_amd64
+
+	cargo build --release --target=x86_64-pc-windows-gnu
+	mv ./target/x86_64-pc-windows-gnu/release/mandelplot.exe ./release/mandelplot_windows_amd64
+
+	cd release/ && zip -r mandelplot_linux_amd64 mandelplot_linux_amd64/
+	cd release/ && zip -r mandelplot_windows_amd64 mandelplot_windows_amd64/