return everything on empty query. fixes #33

src/main/java/info/textgrid/rep/service/TgsearchClientService.java

@@ -49,6 +49,11 @@ public class TgsearchClientService {
       String query, String order, int start, int limit,
       List<String> filter, boolean sandbox) {
 
+    // when query is emtpy return everything
+    if(query.equals("")) {
+      query = "*";
+    }
+
     return searchClient.searchQuery()
         .setQuery(query)
         .setOrder(order)