Merge pull request #159 from polvi/config_drive

feat(config_drive): add config drive support to the 0.1.0 API.
diff --git a/servers.go b/servers.go
index 16056ad..a00577e 100644
--- a/servers.go
+++ b/servers.go
@@ -766,6 +766,8 @@
 	Links           []Link                   `json:"links,omitempty"`
 	OsDcfDiskConfig string                   `json:"OS-DCF:diskConfig,omitempty"`
 	SecurityGroup   []map[string]interface{} `json:"security_groups,omitempty"`
+	ConfigDrive     bool                     `json:"config_drive"`
+	UserData        string                   `json:"user_data"`
 }
 
 // ResizeRequest structures are used internally to encode to JSON the parameters required to resize a server instance.