Moved to google.golang.org/genproto/googleapis/api/annotations

Fixes #52

vendor/github.com/Masterminds/sprig/docs/os.md

@@ -0,0 +1,24 @@
+# OS Functions
+
+_WARNING:_ These functions can lead to information leakage if not used
+appropriately.
+
+_WARNING:_ Some notable implementations of Sprig (such as 
+[Kubernetes Helm](http://helm.sh) _do not provide these functions for security
+reasons_.
+
+## env
+
+The `env` function reads an environment variable:
+
+```
+env "HOME"
+```
+
+## expandenv
+
+To substitute environment variables in a string, use `expandenv`:
+
+```
+expandenv "Your path is set to $PATH"
+```