Move launcher working directory to standard location (#31)

* Move launcher working directory to standard location

* Fix settings save, attempt to get better backtraces

* Add environment variable for settings path

theseus_cli/src/main.rs

@@ -1,4 +1,5 @@
 use eyre::Result;
+use futures::TryFutureExt;
 use paris::*;
 
 mod subcommands;
@@ -16,12 +17,8 @@ async fn main() -> Result<()> {
     let args = argh::from_env::<Args>();
     theseus::init().await?;
 
-    let res = args.dispatch().await;
-    if res.is_err() {
-        error!("An error has occurred!\n");
-    } else {
-        theseus::save().await?;
-    }
-
-    res
+    args.dispatch()
+        .inspect_err(|_| error!("An error has occurred!\n"))
+        .and_then(|_| async { Ok(theseus::save().await?) })
+        .await
 }