Add polish variants of welcome.mkd, login.mkd and EmptyRepositoryPage

Lukasz Jader

2012-07-14 adef42eefc08541f0433147441c2f2d575ac134f

 src/com/gitblit/JsonServlet.java

@@ -122,6 +122,7 @@
      if (o != null) {

         // Send JSON response

         String json = JsonUtils.toJsonString(o);

         response.setCharacterEncoding(Constants.ENCODING);

         response.getWriter().append(json);

      }

   }