Implement expansion of wildcards for Windows

[assarbad]

• Implements expansion of wildcards ("globbing") via the 'wild' crate
• Should close issue #39

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Side-note: I noticed that cargo test gives me three errors, but it did that even prior to my changes. Is this known?

[mtimkovich]

Thanks for looking out for the windows users!

I'll take a look at those failing tests, thanks for the heads up.