added simple history support

ablescript_cli/src/repl.rs

@@ -15,6 +15,8 @@ pub fn repl(ast_print: bool) {
         match rl.readline(if partial.is_some() { ">> " } else { ":: " }) {
             Ok(readline) => {
                 let readline = readline.trim_end();
+                rl.add_history_entry(readline);
+                
                 let partial_data = match partial {
                     Some(line) => line + &readline,
                     None => readline.to_owned(),