Add better support for sharing in the sugar toolkit
completed by: Agustin Zubiaga
mentors: Walter Bender, Gonzalo Odiard
There is a lot of redundant code in Sugar activities that use collaboration. Much of this code could be consolidated into an extension to the Sugar activity class.
(1) Add an extension to the Sugar activity class to fold in the general case for collaboration.
(2) Modify an existing activity to demonstrate the use of this extension.