Exclude auto-snapshot versions

Fedora4 creates snapshot versions prior to restoring previous versions. We don’t want to count these as part of our versions.

This gets us running with the Fedora 4.0.0 release candidate.
Isn't 'collect' an alias to 'map'? If so, can these be lumped into one block?  Like:

```ruby
set.reject { |object| object.to_s.match('auto-snapshot') }.compact
```