Init the rust library

.gitignore

@@ -10,3 +10,12 @@ Cargo.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
+
+
+#Added by cargo
+#
+#already existing elements are commented out
+
+/target
+#**/*.rs.bk
+#Cargo.lock

Cargo.toml

@@ -0,0 +1,7 @@
+[package]
+name = "bigint"
+version = "0.1.0"
+authors = ["justin"]
+edition = "2018"
+
+[dependencies]

src/lib.rs

@@ -0,0 +1,7 @@
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn it_works() {
+        assert_eq!(2 + 2, 4);
+    }
+}