Move things around for gb

This moves all restic source files to src/, and all vendored
dependencies to vendor/src.

vendor/src/github.com/pkg/sftp/README.md

@@ -0,0 +1,29 @@
+sftp
+----
+
+The `sftp` package provides support for file system operations on remote ssh servers using the SFTP subsystem.
+
+[![UNIX Build Status](https://travis-ci.org/pkg/sftp.svg?branch=master)](https://travis-ci.org/pkg/sftp) [![GoDoc](http://godoc.org/github.com/pkg/sftp?status.svg)](http://godoc.org/github.com/pkg/sftp)
+
+usage and examples
+------------------
+
+See [godoc.org/github.com/pkg/sftp](http://godoc.org/github.com/pkg/sftp) for examples and usage.
+
+The basic operation of the package mirrors the facilities of the [os](http://golang.org/pkg/os) package.
+
+The Walker interface for directory traversal is heavily inspired by Keith Rarick's [fs](http://godoc.org/github.com/kr/fs) package.
+
+roadmap
+-------
+
+ * Currently all traffic with the server is serialized, this can be improved by allowing overlapping requests/responses.
+ * There is way too much duplication in the Client methods. If there was an unmarshal(interface{}) method this would reduce a heap of the duplication.
+ * Implement integration tests by talking directly to a real opensftp-server process. This shouldn't be too difficult to implement with a small refactoring to the sftp.NewClient method. These tests should be gated on an -sftp.integration test flag. _in progress_
+
+contributing
+------------
+
+We welcome pull requests, bug fixes and issue reports.
+
+Before proposing a large change, first please discuss your change by raising an issue.