Use loader-utils with interpolateName for support all properties in name

[alexander-akait]

Example: i need feature [<hashType>:hash:<digestType>:<length>]. Thanks!

[mixtur]

Sorry. I really don't have time at the moment. Though I'll look at it in a week or two.
You are welcome to fork and do it yourself If you don't want to wait that much.
I am accepting PRs.

[mixtur]

Also "loader-utils" and "interpolateName" are not really applicable there since webpack-spritesmith is not a loader. It is a plugin. Still, I'll see what I can do.

[alexander-akait]

@mixtur loader-utils have some feature what can be using not only for loaders. Thanks. If I find time, I do PR.

[mixtur]

should work in 0.3.0