Shiny demo named "Going async with Shiny" for the eRum 2018 event.
The async version of Shiny addresses the blocking behaviour between different user sessions. The blocking persists for the same user, which is an intentional decision by Joe Cheng.
Buttons simulate processes that run for a certain amount of time either synchronously, or asynchronously. When tasks are done a verbatimTextOutput is rendered, and the background color changes to green for 2 seconds.
