Added an Error create.

src/morethantext/mod.rs

@@ -98,8 +98,10 @@ impl Table {
 use async_std::sync::{Arc, RwLock};
 use std::collections::HashMap;
 
+pub mod error;
 mod fieldtype;
 
+use error::MTTError;
 use fieldtype::{FieldType, StaticString};
 
 #[derive(Clone)]