Add -o/--output option.

[mcdado]

It's not perfect since if you pass multiple files and specify one single output, it will keep overwriting that file. At least it's not destructive, but there's room for improvement. At least it skips folders altogether.

[goatslacker]

Let me smoke test this...

[goatslacker]

I created a dir structure like:

- foo/
| foo.js
| bar/
|-- bar.js

and ran it: bin/fixmyjs foo/ -o dest/

but nothing happened. What's supposed to happen in that situation?

[mcdado]

In my contribution directories are just ignored. It could be improved in a way that if the -o option is a directory AND the argument is a single directory, then it should operate recursively. Otherwise, imho, it should error out or something…