Fixed problem that PagesServlet couldn't provide index.htm and index.mkd.

Yuhi Ishikura

2013-06-02 1dcfd2e983489e3f6c318e1d30ae59c925349fbc

 src/main/java/com/gitblit/JsonServlet.java

@@ -123,6 +123,7 @@
         // Send JSON response

         String json = JsonUtils.toJsonString(o);

         response.setCharacterEncoding(Constants.ENCODING);

         response.setContentType("application/json");

         response.getWriter().append(json);

      }

   }