add peer review responses to gitignore
add peer review responses to gitignore

daattali/shiny-server,LucianoSP/shiny-server_daattali,englianhu/daattali-shiny-server,hansthompson/shiny-server,LucianoSP/shiny-server_daattali,LucianoSP/shiny-server_daattali,hansthompson/shiny-server,hansthompson/shiny-server,englianhu/daattali-shiny-server,englianhu/daattali-shiny-server,daattali/shiny-server,daattali/shiny-server