Accept config path as argument

src/main.rs

@@ -8,12 +8,14 @@ mod store;
 
 use comm::{Channel, Message};
 use config::Config;
+use std::env;
 use std::sync::Arc;
 use std::sync::mpsc;
 use std::thread;
 
 fn main() {
-    let cfg = config::load("./panel.toml");
+    let config_path = env::args().nth(1).unwrap_or("./panel.toml".to_string());
+    let cfg = config::load(&config_path);
     let cfg = Arc::new(cfg);
 
     let (tx, rx) = mpsc::channel::<Message>();