high definition video quality
me, myself --> my memory
changed some study text
added low empathy version
fixed typo
adding action collection instead of using empathy action/random button.
in this way, we can keep the list of actions to replace from the text
middle of working. program is broken
not much progress yet
reorganize the internal data structure to support replacing text to
actions.
added repeat button to speech widget.
fixed minor bug on action queue (mutex not released)
Merge branch 'master' of redbird.cs.umanitoba.ca:projects/nao-controller

Conflicts:
	robot-controller/Study/Empathy.py
	robot-controller/Study/EmpathyGUI.py
	robot-controller/Study/EmpathyRandomButton.py
	robot-controller/Study/EmpathyScenarioButton.py