fix aspect ratio bug on camera image
defined video quality constant to change video quality easily.
added replaceable speech text for better English when it speaking out
the answer.
Empathy dialogues are updated
separate gui code into different file. added more conversations.
move scenario buttons to left-most
Merge branch 'master' of redbird.cs.umanitoba.ca:projects/empathy

Conflicts:
	robot-controller/Study/Empathy.py
Refactored code