Checking in changes prior to tagging of version v0.5.0

## [v0.5.0](https://github.com/Songmu/goxz/compare/v0.4.1...v0.5.0) (2019-11-19)

* change interface of func Run [#19](https://github.com/Songmu/goxz/pull/19) ([Songmu](https://github.com/Songmu))
* add -build-installsuffix option to support -installsuffix [#17](https://github.com/Songmu/goxz/pull/17) ([Songmu](https://github.com/Songmu))