Show gopkg import alternative in README (#13)

ajg · web-flow · commit 523a5da1a92f · 2016-08-22T19:00:20.000-04:00
diff --git a/README.md b/README.md
@@ -28,6 +28,7 @@ Usage
 
 ```go
 import "github.com/ajg/form"
+// or: "gopkg.in/ajg/form.v1"
 ```
 
 Given a type like the following...
