Add a sync icon
Hello,
First of all thank you for an amazing tool =)

We have a refresh icon that can be used to reefer sync but..., and this is probably a "my own preference", but I would like to ask if a proper sync icon is to be expected? I think one similar to Font Awesome would be more suitable.  It´s really helpful in mobile apps so it makes sense to be available.

Once again, thanks for Ratchet.
