Vagrant box management (add, list and remove)

[Rockin2]

Is your feature request related to a problem? Please describe.
We want to add vagrant boxes with Salt. (vagrant box add)

Describe the solution you'd like
A function in the vagrant modules to install a vagrant box. Two others function to remove and list boxes could be good also.

Describe alternatives you've considered
Using cmd.run function. It works but it is not really clean.

[s0undt3ch]

Thank you for the feature submission @Rockin2