Vailyn 1.5.2-0

[Improvements]

• replaced old subprocess API with the newer run()
• added Tor support + management for macOS (brew services required)
• added service backend to Tor handling (for Linux distributions not using systemd)
• invoke progresswin() less frequently on Windows

[Bug Fixes]

• fixed crash at startup on Windows (due to wrong clear command)
• fixed crash in loot() on WIndows due to date format containing :