Exclude .ruby-version
Tidy up vcloud-query options.

- `vcloud-query --no_power_on` seems unlikely
- move uninteresting arguments to the end
- clarify usage without a type argument (result is exactly those object
  types available to the caller and may not be all possible types)
Merge pull request #47 from nosborn/vcloud-query-tidy

Tidy up vcloud-query options.
Merge pull request #46 from nosborn/no_ruby_version

Exclude .ruby-version