Changelog for 0.2.0

1. Enhancements

• Add NodeActivator.epmd_running?/0

2. Bug fixes

• Rename one of test code.
• Fix the issue of fully-qualified hostname on Linux. It requires to use IP address instead of hostname.

3. Soft deprecations (no warnings emitted)

4. Hard deprecations

• Deprecate supporting Windows, temporally. To recover it, need to fix the issue that Node does not respond on Windows (related to #187).