Add gulpfile to build lib (#11)

Author: hckhanh

gulpfile.js

@@ -0,0 +1,10 @@
+const gulp = require('gulp');
+const babel = require('gulp-babel');
+
+gulp.task('build', () => {
+  return gulp.src('src/react-tree.js')
+    .pipe(babel({
+      presets: ['es2015', 'react']
+    }))
+    .pipe(gulp.dest('lib'));
+});

package.json

@@ -5,7 +5,8 @@
   "main": "./lib/react-tree.js",
   "scripts": {
     "start": "webpack-dev-server --port=3000",
-    "test": "jest"
+    "test": "jest",
+    "build": "gulp build"
   },
   "repository": {
     "type": "git",
@@ -37,12 +38,12 @@
     "gulp": "^3.9.1",
     "gulp-babel": "^6.1.2",
     "jest-cli": "^14.1.0",
-    "jstree": "^3.3.1",
     "react-addons-test-utils": "^15.3.0",
     "webpack": "^1.13.1",
     "webpack-dev-server": "^1.14.1"
   },
   "dependencies": {
+    "jstree": "^3.3.1",
     "react": "^15.3.0",
     "react-dom": "^15.3.0"
   },