Committer: Guandao Yang <Grendel@dhcp-clara-4596.redrover.cornell.edu>
	[implement] implement the basic audio verification system

 On branch updateAudioJs
 Changes to be committed:
	modified:   .idea/workspace.xml
	modified:   application/controllers/main.php
	new file:   application/libraries/data_model/SingleComparison.php
	deleted:    application/libraries/data_model/Single_click.php
	modified:   application/views/cali.php
	modified:   js/experiments/audios.js
 Committer: Guandao Yang <Grendel@dhcp-clara-3034.redrover.cornell.edu>

 On branch updateAudioJs
 Changes to be committed:
	modified:   .idea/workspace.xml
	modified:   application/controllers/main.php
	modified:   application/core/MY_Model.php
	new file:   application/libraries/data_model/IntervalVerification.php
	modified:   application/libraries/data_model/SingleComparison.php
	modified:   application/models/parti.php