add a binary for shenlong that will expose some of shenlong's functionality.

Currently it can detect the current project, run a command from the current project's root, and print the absolute path of the project.

src/main.rs

@@ -0,0 +1,29 @@
+use std::env;
+use std::path::Path;
+use scouter::Scouter;
+
+use std::process::Command;
+
+fn main() {
+    let path = Path::new(".").canonicalize().expect("failed to canonicalize path");
+    let mut scouter = Scouter::new(path);
+    let project = scouter.next().expect("No supported project found");
+    
+    let mut args = env::args();
+    args.next();
+    match args.next().as_ref().map(|arg| arg.as_str()) {
+        Some("info") => println!("{:?}", project),
+        Some("where") => println!("{}", project.path().display()),
+        Some("run") => {
+            Command::new(args.next().unwrap())
+                .args(args)
+                .current_dir(project.path())
+                .spawn()
+                .expect("command failed to start")
+                .wait()
+                .expect("failed to wait on child");
+        },
+        Some(_) => println!("unrecognized command"),
+        None => println!("{:?}", project)
+    }
+}