Add an option to define a target folder where to put the subset fonts

[nhoizey]

I would like the subset fonts to be created in a target folder different from the source folder where the full TTF is.

I can move the files myself of course, but this would be a little more convenient.

Thanks!

[nhoizey]

I tried to look at the code but didn't see where I could add this. If you have any advice, I can try to built it and make a PR.

[kid4git]

There is an apparently undocumented --output parameter that does just what you want. It works with relative and absolute paths. I detected it in cmd.js.

[nhoizey]

@kid4git it works indeed, thanks! 👍

@zachleat should I make a PR to update documentation with this feature, or do you prefer to keep it undocumented for a reason we don't know (yet)?

[nhoizey]

I see there was a PR on the filamentgroup repo: filamentgroup#64

[zachleat]

If you port that PR over I will merge it!

[nhoizey]

@zachleat done: #9

[nhoizey]

PR #9 already merged