fix(pkg/gitreceveive/storage/interfaces.go): add required import

Aaron Schlesinger · Aaron Schlesinger · commit f93b48ed2585 · 2016-03-03T16:31:33.000-08:00
diff --git a/pkg/gitreceive/storage/interfaces.go b/pkg/gitreceive/storage/interfaces.go
@@ -1,6 +1,8 @@
 package storage
 
 import (
+	"io"
+
 	s3 "github.com/minio/minio-go"
 )
 
