Does bower/rewrite intentionally not support "git@example.com" style repo URLs?

I ran into an issue today where I could not use a `git@example.com` style URLs in my `bower.json`.
The readme indicates that `git://example.com` URLs are supported, but not explicitly `git@example.com` URLs.
I am aware that it is better to use `git://` for read only repos, but the current implementation of my corporate git repo only supports `git@`.
Such syntax works fine in bower/master.

I cooked up a trivial PR to demonstrate one possible implementation.

Thank you for your help and for such a useful tool! Cheers :beers:!