2017-07-28, Version 0.4.0

Notable changes

* **Configuration**
  * add an environment variable to decide whether generate configuration
    file or not.

PR-URL: akyuujs#27

2017-07-11, Version 0.3.0

Notable changes

* **Service Loader**
  * Use class name as the service name with underline when `get()` and
    `getClass()`.

PR-URL: akyuujs#19

some new features

fix a bug

修复一个 HTTP 请求器无 Status Code 的 Bug

fix an error

fix some bugs