Share with friends
Share the selected text with friends via Twitter, Facebook or Google+. In order to share on the selected social network, the user must hook it up first.
User can share to get a free month of pro features. To do so include a get parameter
for with value
pro. If user cannot share for pro anymore,
403 Forbidden with an error explanation is returned. To know if user can share for pro or not check
Share to network.Possible values:
Optional share message.