AppImage's are now processed better

AppImage's desktop files are now extracted so name, category, and icon can be obtained
Made all icons be scaled so you don't get icons that are too big or small

app.go

@@ -25,7 +25,8 @@ type app struct {
 
 func (a *app) getTreeIter(store *gtk.TreeStore) *gtk.TreeIter {
 	it := store.Append(nil)
-	store.SetValue(it, 0, a.icon)
+	scaled,_ := a.icon.ScaleSimple(32,32,gdk.INTERP_HYPER)
+	store.SetValue(it, 0, scaled)
 	if portableHide {
 		store.SetValue(it, 1, strings.TrimSuffix(a.name, "Portable"))
 	} else {