Shortlinks for Jetpack sharing buttons

Description

Use shortlinks instead of permalinks in Jetpack sharing buttons

• If you havent set up any shortlink plugin on your site, the sharing buttons will use the default numerical permalinks
• If you have enabled WP.me Shortlinks in Jetpack, the sharing buttons will use them
• If youve installed another plugin to create custom shortlinks, the sharing buttons will use them

Important: for this plugin to work, you must activate Jetpack first, and activate the Sharing module.

This plugin is a work in progress. You can report issues here, or submit a pull request on GitHub.