Hi,
you have to add this library to web IDE manually.
the easiest way is:
- create new app for example Queue_Test.ino -> save.
- go to github repository choose any example click “Raw” then ctrl+a and ctrl+c
- go back to Web IDE and paste the example in to your app -> save.
- on the right top corner on Web IDE click “+” , give the name for new .cpp and .h file for example “cppQueue” -> save.
- go back to github /Queue/src/cppQueue.cpp click “Raw” then ctrl+a and ctrl+c
- go back to Web IDE and paste in to your new cppQueue.cpp -> save
- go back to github /Queue/src/cppQueue.h click “Raw” then ctrl+a and ctrl+c
- go back to Web IDE and paste in to your new cppQueue.h (don’t worry if .h file is not empty just delete all and paste cppQueue.h copied from Github ) -> save.
- remove
// This #include statement was automatically added by the Particle IDE.
#include "cppQueue.h"
which is on the top of your app -> save -> veryfy -> enjoy 
