+DownloaderActivity; +DownloaderIntentService; layout of DownloaderActivity is almost done;
+multiple string resources; +updateUI; +putting references to UI`s views in onCreate() into private fields
updateUI() on onResume()
+multiple ACTION_* and KEY_* in DownloaderIntentService; +basic handling of recieved intents in DownloaderActivity
+downloadProgressBar updating in updateUI()