Added Cargo.toml and main.rs, even though neither does anything of interest

yet.

Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+
+name = "post_scarcity"
+version = "0.1.0"
+authors = ["Simon Brooke <simon@journeyman.cc>"]
+
+[dependencies]

src/main.rs

@@ -0,0 +1,4 @@
+fn main() {
+    println!("Post-scarcity software environment, version 0");
+    println!("Note: This does not work yet.");
+}