Restart steam option (#82)

Adds options to start and stop steam when importing

src/steam/settings.rs

@@ -5,4 +5,6 @@ pub struct SteamSettings {
     pub location: Option<String>,
     pub create_collections: bool,
     pub optimize_for_big_picture: bool,
+    pub stop_steam: bool,
+    pub start_steam: bool,
 }