config: do not hardcode machine type

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
manager: fix libvirt createXML issue

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
config: use host-model cpu by default

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
config: open guest image with cache=none

this cache option improves image security

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
config: enable guest ACPI

By default, libvirt do not enable ACPI for VM, enable it.

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
vman: refactor logger

Add logging support

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
refactor/main: rename vman.py to main.py

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>
refactor/main: catch exception and log it

Signed-off-by: Dunrong Huang <riegamaths@gmail.com>