Make it easy to link static websites without public folder

[stefansundin]

This is an alternative to #115. I think it's a cleaner solution.

[philnash]

To be clear here. This creates the public directory under ~/.pow/dir_name and that then works for static sites in the folder?

What needed updating in the unlink command? Why might there be an error saying that the symlink couldn't be removed?

[stefansundin]

Correct. It creates ~/.pow/dir_name, and then creates a symlink from ~/.pow/dir_name/public to the current directory. Basically emulating public/ without requiring you to create a public directory in your project.

I need to update unlink because rm_f is unable to delete ~/.pow/dir_name if it is a directory. The reason I added the check is to not say "successfully" if we just assume the previous call worked. Before I changed rm_f to rm_rf, it said that it was successful but it wasn't.