Implementation of social sharing buttons into Jekyll Bootstrap

[xpressyoo]

Details and explanations can be found in this blog post.

modified:   _includes/JB/sharing
new file:   _includes/JB/sharing-providers/facebook
new file:   _includes/JB/sharing-providers/global
new file:   _includes/JB/sharing-providers/googleplus
new file:   _includes/JB/sharing-providers/hn
new file:   _includes/JB/sharing-providers/linkedin
new file:   _includes/JB/sharing-providers/twitter
modified:   _includes/themes/twitter/post.html

[darth10]

This request must land! I've looked around for sharing plugins but this way seems to be right.

[musketyr]

why isn't this pull request merged, it looks terrific!

[sanandnarayan]

is this available as a plugin?

[nurettin]

@musketyr because people might want to use share links instead of javascript trackers?

[groundh0g]

Looks good. Merge conflicts now. Bumping to next release and adding a reference to related issue #90.

Sorry this has taken so long to review. Thanks for the contribution!