Windows 10 colored terminal

Windows 10 anniversary update added `ENABLE_VIRTUAL_TERMINAL_PROCESSING` flag to console mode, which can be used to enable ANSI color codes. This can be enabled for LuaJIT environment (where FFI is available). Below is my way to enable it.

https://github.com/MikuAuahDark/livesim2/blob/master/logging.lua#L59-L63