Output tabs now (mostly) work.

Add downloading files as an archive (needs work)
Add option for keeping the tabs in sync

src/web/index.js

@@ -53,6 +53,7 @@ function main() {
         logLevel:            "info",
         autoMagic:           true,
         imagePreview:        true,
+        syncTabs:            true
     };
 
     document.removeEventListener("DOMContentLoaded", main, false);