FR/Bug: specifying vars/namespaces loads too many namespaces

[NoahTheDuke]

One might expect that -n or -v would narrow the require'd namespaces to only the namespaces passed into the cli, but all namespaces in -d (or test/) are required even if they're filtered out later.

[NoahTheDuke]

Tackled in ce9b745, will be included in the next release.