Laying the ground work to add pages.

src/lib.rs

@@ -13,6 +13,11 @@ use queue::{Message, MsgType, Queue};
 use session::Session;
 use uuid::Uuid;
 
+#[derive(Clone, Debug)]
+pub enum ErrorType {
+    DocumentNotFound,
+}
+
 #[derive(Clone)]
 pub struct MoreThanText {
     client_channel: ClientChannel,