You can choose to add a Facebook share button, in addition to the Facebook like button, for your website posts.  You can do it just by the code you get from Facebook and copy/paste it in your website Admin Panel, app configurations pages, Facebook Like button code section.  Facebook added it as a new option, and you can get your customized code on the Facebook page at https://developers.facebook.com/docs/plugins/like-button .  It's really just about adding "&share=true" to the iframe src code.

For example, for the photo uploads Facebook Like & Share code you would copy/paste on your Admin Panel > Configure Site > Social Configurations > Photo Uploads Config page:

Code: Please login/register for access

There are other configuration options too, which you can get on the Facebook page noted.

Related: "Updated Facebook Like, Twitter Share, Google+1 share buttons"