Merge pull request #13 from iemejia/master

Upgraded the script for python 2.6x or superior compatibility
Delete unused scripts.

They are getting in the way and they can be checked in the history, if we
ever need to refer back to them.
Removed debugging print
Fixed bug: Video reproduced at higher speed was downloaded by default.
Now it chooses by default the one with 1.0x speed.

To reproduce you can test with the statistics course that it's running now.