Update readme with demo

Author: Kevin Scott

README.md

@@ -4,6 +4,13 @@ ML Classifier is a machine learning engine for quickly training image classifica
 
 This package is intended as a companion for [`ml-classifier-ui`](https://github.com/thekevinscott/ml-classifier-ui), which provides a web frontend in React for uploading data and seeing results.
 
+## Demo
+
+An interactive demo can be found here.
+
+![Demo](https://github.com/thekevinscott/ml-classifier-ui/raw/master/example/public/example.gif)
+*Screenshot of demo*
+
 ## Getting Started
 
 ### Installation

src/index.ts

@@ -22,19 +22,19 @@ import {
 
 interface IArgs {
   onLoadStart?: Function;
-  onAddDataStart?: Function;
-  onClearDataStart?: Function;
-  onTrainStart?: Function;
-  onEvaluateStart?: Function;
-  onSaveStart?: Function;
-  onPredictStart?: Function;
   onLoadComplete?: Function;
+  onAddDataStart?: Function;
   onAddDataComplete?: Function;
+  onClearDataStart?: Function;
   onClearDataComplete?: Function;
+  onTrainStart?: Function;
   onTrainComplete?: Function;
+  onPredictComplete?: Function;
+  onPredictStart?: Function;
+  onEvaluateStart?: Function;
   onEvaluateComplete?: Function;
+  onSaveStart?: Function;
   onSaveComplete?: Function;
-  onPredictComplete?: Function;
 }
 
 // export { DataType } from './types';