Add option to deploy to a specific folder

[zenorocha]

As a user I want to deploy to a specific folder (not only root) inside of gh-pages.

[zenorocha]

Any plans to implement this feature?

This is specially important for i18n, since you need to deploy to /es, /pt, etc.

[zenorocha]

Also it would be nice for ConfBoilerplate specifically since organizers need to push different sites for each meetup or year like: myconf.com/2014

[mikeumus]

Hey @zenorocha, my suggestion to #27 of setting docpad.coffee's filePaths: [ ] may be the answer here too. Try it out and let me know. I hope it helps. 😃