if (feed.getTarget() != null) then show a button label "Go" in
feed's display area
    Action to perform on this button: Open a popup, show the text
returned by feed.getTarget().
    (override getTarget() of promotion & StoreItem)
    if (feed.getTarget() != null) then show a button label "Go" in
feed's display area
    Action to perform on this button: Open a popup, show the text
returned by feed.getTarget().
Merge pull request #16 from smartpad/Danh-Developer

Merge enhance-8