You can now specify a glob of file patterns to pass through without compilation

Start with:

    root/
    --scripts/
    ----a.coffee
    ----b.js
    ----README.md

Perform:

    gulp.src('scripts/*.*')
      .pipe(coffee({ignore: '*.{js,md}'}) // '*.js' is the default
      .pipe(gulp.dest('build'))

End up with:

    root/
    --scripts/
    ----a.coffee
    ----b.js
    ----README.md
    --build/
    ----a.js
    ----b.js
    ----README.md