Merge pull request #53 from aszxqw/master

fix bug: 'http: multiple response.WriteHeader calls'

.gitignore

@@ -1 +1,3 @@
 weed
+tags
+*.swp

go/weed/weed_server/common.go

@@ -65,7 +65,6 @@ func writeJsonQuiet(w http.ResponseWriter, r *http.Request, httpStatus int, obj
 	}
 }
 func writeJsonError(w http.ResponseWriter, r *http.Request, httpStatus int, err error) {
-	w.WriteHeader(http.StatusInternalServerError)
 	m := make(map[string]interface{})
 	m["error"] = err.Error()
 	writeJsonQuiet(w, r, httpStatus, m)