This is equivalent to `if (name[0] === '/')` no need to match against a regex.

I also think instead of `process.cwd()` it's better to have `resolveInclude` take an extra argument of `basedir` and pass `options.basedir` as the value of that argument.

The code we use for jade is: https://github.com/visionmedia/jade/blob/master/lib/parser.js#L421-L428