Added hook for replacing background color.
Added terminator to Depends.
Added support for defining VAGRANT_PROVIDER.
Added VMware Workstation customization.
Added support for /etc/digabi/whitelisted-users.d/*.conf.

Currently hook 7920-limit-accounts.hook.chroot disables shell access for
all users except those that have been whitelisted. This patch allows
packages to add new users to whitelist.

Configuration file contents: user names, separated by line breaks.
Comments (beginning with #) will be grep'd out when running hook.
Added support for defining repository/proxy in Jenkins job.
Added support support for building images with VMware Workstation.