v1.12.0

• Make wait_for_sysprep functionality configurable (see README.md for details). Defaults to false to resolve #222. (nsidc:make-sysprep-configurable)
• Fix issue (#231) where finding no adapters while waiting for the IP address to be ready broke the up process. (nsidc:fix-filter-ssh)
• Fix installation of vagrant-vsphere under Vagrant 1.9.2. (nsidc:fix-install-with-1.9.2)