[#26 + s_t_a/#41] Calling "handlePostNewIQSet" now to save questions 

This pull request is linked to the following issues : https://github.com/SMILEConsortium/node-smile-server/issues/26 and https://github.com/SMILEConsortium/smile_teacher_android/issues/41

Teacher app calls exports.handlePostNewIQSet now to save questions into a new IQSet but it is still not working.
I added some Console.log in the function to see different values