Will make it possible to configure your own private ssh key for vagrant instead of
the default vagrant private key.
Will set the ssh_key in the Vagrantfile if the ssh_key attribute is set in .kitchen.yml
This didn't work before as in the config.merge(state) the setting in the .kitchen.yml
file is overriden by the setting in the Vagrantfile.

Has also added documentation for this configuration
Use platform name to determine which vagrant box to download
Don't use the :quiet option (it doesn't do anything)
Relax dependency on test-kitchen
Remove vagrant provisioner
Make cane and tailor happy
Remove references to vagrant-berkshelf in README
Version bump v0.11.2
Version bump 0.11.2.dev
Test on Ruby 1.9 and Ruby 2.0
Remove additional references to vagrant-berkshelf and Berkshelf

Berkshelf is still used, but we no longer require/use the vagrant-berkshelf
plugin. Dependencies are resolved and copied by Test Kitchen proper using
Berkshelf (or Librarian), so the plugin is just noise and seems to be an area
of confusion surrounding the purpose of this driver.
Revert "Don't use the :quiet option (it doesn't do anything)"

This is required so that Vagrant version checking commands are not
echo'd to the screen.

This reverts commit 07c86625180ed92d904ab7e68ab57b3e7d24868b.
Release 0.11.3, much more quiet now.
Up version for development.
Add support for vagrant-cachier plugin.