Add argparse to dependencies (python 2.6 compat)
Backport subprocess.check_output if needed (python 2.6 compat)
Update  CHANGES
Fix regression with python 2.7
Update tests to use utils.check_output rather than subprocess
Add python 2.6+ support in README
Fix #3 : Merge branch 'compat_python26' into develop

Infoqscraper is now compatible with python 2.6
Fix #4: btrfs support

Until Linux 3.7 btrfs only supported a very small number of hard links to the
same inode. When the limit is reached, link returns EMLINK.

This error is now properly handled.
Fix broken test. Presentation id can be smaller than 5 caracters.
Fix broken test. Cache size can be greater than 999MB.
Fix #5 : Support ffmpeg 0.8 and later.

Rework ffmpeg usage to make infoqscraper compatible with ffmpeg 0.8+.

0.8.* is shipped with Ubutun 12.04 so it is important to support it.

I was not able to support 0.5 because the images are not properly scaled. It
could have been solved using PIL to resize the image but I want to get ride
of PIL eventually (not compatible with python 3).
Typo fix.
Fix #7 : Tell what to do when .local/bin is not in the PATH
Merge branch 'develop' v0.0.4
Version bump: 0.0.4