0.1.0

Update CI script.

- Do not use zip.
- For Windows, use gnu toolchain, which will eliminate appveyor and MSVC
dependencies.
- Change integration tests logging level.
- Only cat logs when tests failed.
- Use docker command availability to decide whether to run integration tests.
- Fix compatible with Windows. libc on Windows does not have `waitpid`.
- Echo as error when exited unexpectedly.