Allow to use wildcards in path

[zlorf]

It would be nice if sed allow to use wildcards and other goodies available in most of grunt tasks (http://gruntjs.com/configuring-tasks#globbing-patterns), for example:

sed:
    all_api_url:
        path: "build/**/*.{js,html}"
        pattern: '%API%'
        replacement: "<%= config.api_url %>"

For now it fails: Warning: ENOENT, no such file or directory.

[jharding]

Pull requests welcomed 😄

[vdininski]

+1

[daniel-rabe]

#18