Add image-sprite-webpack-plugin

Generates bitmap image spritesheets from your stylesheets.

https://github.com/naver/image-sprite-webpack-plugin

* Simple and easy to use.
* Supports bitmap images (png, jpg, gif, not svg)
* Supports HMR.
* Supports webpack 2.x ~ 4.x.
* Works fine with cooperative plugins (extract-text-webpack, mini-css-extract).
* Requires css-loader to handle CssModule.

Author: hwshim

README.md

@@ -193,6 +193,7 @@ Inspired by the [awesome](https://github.com/sindresorhus/awesome) list. Feel fr
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