rewrite checkpoint

vendor/github.com/tmc/keyring/README.md

@@ -0,0 +1,45 @@
+# keyring provides cross-platform keychain access
+
+http://godoc.org/github.com/tmc/keyring
+
+Keyring provides a common interface to keyring/keychain tools.
+
+License: ISC
+
+Currently implemented:
+- OSX
+- SecretService
+- gnome-keychain (via "gnome_keyring" build flag)
+
+Contributions welcome!
+
+Usage example:
+
+```go
+  err := keyring.Set("libraryFoo", "jack", "sacrifice")
+  password, err := keyring.Get("libraryFoo", "jack")
+  fmt.Println(password) //Output: sacrifice
+```
+
+## Linux
+
+Linux requirements:
+
+### SecretService provider
+
+- dbus
+
+### gnome-keychain provider
+
+- gnome-keychain headers
+- Ubuntu/Debian: `libsecret-dev`
+- Fedora: `libsecret-devel`
+- Archlinux: `libsecret`
+
+Tests on Linux:
+```sh
+ $ go test github.com/tmc/keyring
+ $ # for gnome-keyring provider
+ $ go test -tags gnome_keyring github.com/tmc/keyring
+```
+