directory structure change to work with glide

glide has its own requirements. My previous workaround caused me some
code checkin errors. Need to fix this.

weed/server/filer_server_handlers_admin.go

@@ -0,0 +1,29 @@
+package weed_server
+
+import (
+	"net/http"
+
+	"github.com/chrislusf/seaweedfs/weed/glog"
+)
+
+/*
+Move a folder or a file, with 4 Use cases:
+	mv fromDir toNewDir
+	mv fromDir toOldDir
+	mv fromFile toDir
+	mv fromFile toFile
+
+Wildcard is not supported.
+
+*/
+func (fs *FilerServer) moveHandler(w http.ResponseWriter, r *http.Request) {
+	from := r.FormValue("from")
+	to := r.FormValue("to")
+	err := fs.filer.Move(from, to)
+	if err != nil {
+		glog.V(4).Infoln("moving", from, "->", to, err.Error())
+		writeJsonError(w, r, http.StatusInternalServerError, err)
+	} else {
+		w.WriteHeader(http.StatusOK)
+	}
+}