ESDeferred 是一个轻量化的的 Deferred 库，内部实现借鉴了 JSDeferred。
MIT License, Copyright (c) 2015 Riophae Lee
A lightweight Deferred implementation written in ECMAScript 7, inspired by JSDeferred
ESDeferred 是一个轻量化的的 Deferred 库，内部实现借鉴了 JSDeferred。
MIT License, Copyright (c) 2015 Riophae Lee
A lightweight Deferred implementation written in ECMAScript 7, inspired by JSDeferred
