Only add the default stations in Libre Droid if the stations list is empty...

Only add the default stations in Libre Droid if the stations list is empty (allows for users to delete unwanted default stations in the future)

clients/libredroid/src/fm/libre/droid/LibreDroid.java

@@ -135,9 +135,11 @@ public class LibreDroid extends ListActivity {
 			Log.d("libredroid", ex.getMessage());
 		}
 		// Add default stations if empty
-		String radioButtons[] = { "Folk", "Rock", "Metal", "Classical", "Pop",
-				"Punk", "Jazz", "Blues", "Rap", "Ambient", "Add A Custom Station..." };
-		stations.addAll(Arrays.asList(radioButtons));
+		if(stations.isEmpty()) {
+			String radioButtons[] = { "Folk", "Rock", "Metal", "Classical", "Pop",
+					"Punk", "Jazz", "Blues", "Rap", "Ambient", "Add A Custom Station..." };
+			stations.addAll(Arrays.asList(radioButtons));
+		}
 		setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, stations));
 		
 		Button tagStation = (Button) findViewById(R.id.tagStationButton);