add new bridge "vbox-br0".
add 30-vboxbrgw set.
Merge pull request #103 from wakameci/30-vboxbrgw

30 vboxbrgw
disable baremetal layer vboxbr0.
add 31-vbox1box set.
adjust vbox line ip addresses.
remove vboxgr dependency.
remove 30-vboxgw.
remove vbox-br0.
Merge pull request #104 from wakameci/31-vbox1box

31 vbox1box
6.6 -> 6.5
Merge pull request #105 from wakameci/vnet-distro-ver

6.6 -> 6.5
add .gitkeep file.
Merge pull request #106 from wakameci/vnet-nested-guest

add .gitkeep file.
transform symlink into referent file/dir.
add symlink for nested guest image file.
Merge pull request #107 from wakameci/vnet-nested-guest

Vnet nested guest
add pack-boxk.sh into replace.sh.
Merge pull request #108 from wakameci/vnet-nested-guest

add pack-boxk.sh into replace.sh.
Merge branch 'master' into feature-support_openvnet-testspec_devenv