Trim whitespace
Update plugin URL
Update the way we check if Jetpack and Sharing are active
Add notice when Jetpack is not active
Create new icon-only, text-only, and text+icon versions

Add 2 new images
Load CSS in the head if text+icon or icon
Load js in the footer if official button
Avoid Fatal errors when Jetpack is deactivated
Update version number to 1.1