gCube social facilities: share updates

The D4Science social networking facilities manifest in a number of applications made available through a thin client Web Browser are conceptually close to the common facilities promoted by social networks - e.g., posting news, commenting on posted news - yet adapted to deal with large scale collaboration and cooperation on comprehensive scientific prod- ucts, data sets, theories and tools. The Share Updates enables (a) users to post updates or interesting links to others (this could be done with any social network) and (b) applications to post updates such as the avail- ability of a new product or facility.