Only load css and js when needed

I have an altered version of your class-public.php that would be great if you could include in the next release. I moved the show button checking into the load_assets() function as well as the_content filter line.
https://gist.github.com/stephywells/f55d6b315404ae774106

What do you think?

https://wordpress.org/plugins/dvk-social-sharing/