Add HandsonTable. Based on @cafe876/Shiny-Sandbox, @yannrichet/Shiny-Sandbox and @brianbolt/rShinyApps
Update README.md and NEWS
Update README.md

cafe876/Shiny-Sandbox@559d19ae37ef67651f7acd15998100631ba11f1d
Update README.md
Update README.md: Change GFM Style
add shinyExt package require
Add file upload example models
update some tests