README + texture example, arrow function style fix

Author: morisil

README.md

@@ -565,8 +565,8 @@ For example by defining custom Promise which can be reused:
 ```javascript
 const loadImage = (src) => new Promise((resolve, reject) => {
  let img = new Image();
- img.onload = e => resolve(img);
- img.onerror = e => {
+ img.onload = () => resolve(img);
+ img.onerror = () => {
  reject(new Error("Failed to load image from: " + src));
  }
  img.src = src;

demo/texture-blue-marble-to-flat-earth.html

@@ -60,8 +60,8 @@
  <script>
  const loadImage = (src) => new Promise((resolve, reject) => {
  let img = new Image();
- img.onload = e => resolve(img);
- img.onerror = e => {
+ img.onload = () => resolve(img);
+ img.onerror = () => {
  reject(new Error("Failed to load image from: " + src));
  };
  img.src = src;