v0.2.4

Changelog

• e231c9c due to ACPI issues, revise doc to record those
• 16836cd for windows poweroff, need more graceful time to do
• c04377c inherit networking config for clone vm
• e6cdbd9 migrate to cocoonstack org
• a9e36fc remove zeroclaw os-image (upstream repo unavailable)
• fa20e68 simplify code, refactor for better future
• 778352e update README and KNOWN_ISSUES, our fork already fixed many issues