do not create readline interface unless interactive() is called. ensu…

…re prompt input goes to end of line after prompting (ux hack, in case user types more before prompt() is returned, will allow additional input to continue at end of inputted text instead if in middle.) (#13)

lib/wit.js

@@ -2,10 +2,6 @@
 
 const request = require('request');
 const readline = require('readline');
-const rl = readline.createInterface({
-  input: process.stdin,
-  output: process.stdout,
-});
 const uuid = require('node-uuid');
 const Logger = require('./logger').Logger;
 const logLevels = require('./logger').logLevels;
@@ -265,9 +261,14 @@ const Wit = function(token, actions, logger) {
     const sessionId = uuid.v1();
     const context = typeof initContext === 'object' ? initContext : {};
     const steps = maxSteps ? maxSteps : DEFAULT_MAX_STEPS;
-    rl.setPrompt('> ');
-    rl.prompt();
-    rl.on('line', ((line) => {
+    this.rl = readline.createInterface({
+      input: process.stdin,
+      output: process.stdout,
+    });
+    this.rl.setPrompt('> ');
+    this.rl.prompt();
+    this.rl.write(null, {ctrl: true, name: 'e'});
+    this.rl.on('line', ((line) => {
       const msg = line.trim();
       this.runActions(
         sessionId,
@@ -277,7 +278,8 @@ const Wit = function(token, actions, logger) {
           if (error) {
             l.error(error);
           }
-          rl.prompt();
+          this.rl.prompt();
+          this.rl.write(null, {ctrl: true, name: 'e'});
         },
         steps
       );