Icons in share.html have the incorrect class name

[AlexBurkey]

Icons in the footer/share section of posts don't have the correct class for the i-frame. All of the "Brands" (Facebook, Twitter, G+, etc.) need to be prefixed with fab and the "Share" icon needs to be prefixed with fa

Example: <i class="fa-facebook" aria-hidden="true"></i> <i class="fab fa-facebook" aria-hidden="true"></i>

[AlexBurkey]

Existing PR to fix: #101

[Tristor]

This is fixed in #110 which has been merged.

[dwy6626]

@AlexBurkey maybe you can check this issue again?