_vagrant plugin completion update
[Vagrant] Add pattern of underscore to vm_list
Merge pull request #234 from tacahilo/vagrant-added-underscore-pattern-to-vmlist

[Vagrant] Add pattern of underscore to vm_list
[Vagrant] update box list completion

relocate `$HOME/.vagrant` to `$HOME/.vagrant.d` and use `$VAGRANT_HOME` if defined
Merge pull request #231 from CircleCode/patch-1

[Vagrant] update box list completion
Merge pull request #227 from bosr/_vagrant_update

_vagrant plugin completion update
Merge branch 'master' of https://github.com/zsh-users/zsh-completions