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Compilation:
------------
a "Make" should work

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Experiment:
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- Original image displayed on the left part of the screen
- Distorted image displayed on the right part of the screen 

Evaluation is done with the F1 to F5 keys of the keyboard.
Hit "RETURN" to validate once the score allocated.
Impossible to validate without selecting a score.

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Annoyance scale:
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	1	Very annoying
	2	Annoying
	3	Slightly annoying
	4	Perceptible but not annoying
	5	Imperceptible

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'Anchoring':
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5 anchor images are first displayed, then 200 distorted images.

