add vendoring with go dep

vendor/github.com/vmware/govmomi/vim25/progress/doc.go

@@ -0,0 +1,32 @@
+/*
+Copyright (c) 2014 VMware, Inc. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package progress
+
+/*
+The progress package contains functionality to deal with progress reporting.
+The functionality is built to serve progress reporting for infrastructure
+operations when talking the vSphere API, but is generic enough to be used
+elsewhere.
+
+At the core of this progress reporting API lies the Sinker interface. This
+interface is implemented by any object that can act as a sink for progress
+reports. Callers of the Sink() function receives a send-only channel for
+progress reports. They are responsible for closing the channel when done.
+This semantic makes it easy to keep track of multiple progress report channels;
+they are only created when Sink() is called and assumed closed when any
+function that receives a Sinker parameter returns.
+*/