Introduce support for handling box architecture. Adds a new
`box_architecture` setting that defaults to `:auto` which will perform
automatic detection of the host system, but can be overridden with a
custom value. Can also be set to `nil` which will result in it fetching
the box flagged with the default architecture within the metadata.
Box collection has been modified to allow existing boxes already
downloaded and unpacked to still function as expected when architecture
information is not available.
This patch introduces a new parameter --all for the remove
command of the box plugin. Setting this parameter will remove
all available versions of a specific box.
Example usage:
```
$ vagrant box list
ubuntu/trusty64 (virtualbox, 20150427.0.0)
ubuntu/trusty64 (virtualbox, 20150430.0.0)
ubuntu/trusty64 (virtualbox, 20150506.0.0)
```
```
$ vagrant box remove ubuntu/trusty64
You requested to remove the box 'ubuntu/trusty64' with provider
'virtualbox'. This box has multiple versions. You must
explicitly specify which version you want to remove with
the `--box-version` flag. The available versions for this
box are:
* 20150427.0.0
* 20150430.0.0
* 20150506.0.0
```
With the --all parameter it is possible to remove all versions at once.
```
$ vagrant box remove --all ubuntu/trusty64
Removing box 'ubuntu/trusty64' (v20150506.0.0) with provider 'virtualbox'...
Removing box 'ubuntu/trusty64' (v20150430.0.0) with provider 'virtualbox'...
Removing box 'ubuntu/trusty64' (v20150427.0.0) with provider 'virtualbox'...
```
Now we have different providers, but the error message didn't tell
anything about it. Suppose I want to remove one of my boxes:
vagrant box remove opscode-ubuntu-12.04 vritualbox
There is a typo in provider name. The error message is:
Box 'opscode-ubuntu-12.04' could not be found.
Therefore I need to double check the box name, and only than I will see
the typo.
This commit make the error message looks like this:
Box 'opscode-ubuntu-12.04' with 'vritualbox' provider could not be
found.
