[FEATURE] Support Vagrant 1.6 version command

Vagrant 1.6 introduces a couple new commands, including the `version` command.
The `version` command shows the currently installed version information and
also checks for new updates available.
[FEATURE] Support Vagrant Share

Vagrant 1.5 introduced Vagrant Share to allow remote access to a Vagrant
environment. This adds support for the `share` and `connect` commands.
[FEATURE] Support Vagrant Cloud commands

Vagrant 1.5 added Vagrant Cloud to share boxes. Some boxes
may be protected, the `login` command allows to access those
protected boxes from Vagrant Cloud.
[FEATURE] Support vagrant global-status

Vagrant 1.6 introduced the `global-status` command which allows
to get a quick overview of all active Vagrant environments for the
currently logged in user.
Improve consistency, remove dots at end of command descriptions
Merge pull request #2787 from irnnr/plugin-vagrant

Support new Vagrant commands
remove export lang for utf-8
added allen's theme based on muse
upgraded to robbyrussell
merged upgrade.sh
Change upgrade origin
Add new theme
remove export lang for utf-8
upgraded to robbyrussell
merged upgrade.sh
Change upgrade origin
修改upgrade
changed to origin
typo, fixes #1806
Minor markup edits