ENH: Updated MovieStim2.py demo

- uses .mov included in folder.
- looping is turned off, as it stalls this video at end and does not
loop ( user can press q to quit if they do enable looping).
- not fixing looping right now as this is the only video I have tested
where the looping fails (I have only tested 10 videos though).
- if becomes a big issue will spend more time to fix.
Merge pull request #592 from isolver/master

ENH: Updated MovieStim2.py demo