For OSX the order of parameters for mktemp matters.
Merge pull request #283 from mhaskel/osx-mktemp-fix

For OSX the order of parameters for mktemp matters.
(MAINT) Log an error when docker image is not set, empty or nil
Merge pull request #279 from electrical/docker_input_validation

Log an error when docker image is not set, empty or nil
Add vagrant_fusion and vagrant_virtualbox providers

Currently the vagrant hypervisor provider just does virtualbox. This
allows the vagrant vmware_fusion plugin to be used instead.
Split vagrantfile sections into sub-providers