Cache js file locally
Useful for multiple invocations when pafy does not stay in memory
Fetch streams from dash url
Added dashmpd streams
PEP tidy
Use dash streams (higher quality audio files #54)
tidyup
Update tests for additional streams
Merge branch 'dashmpd-c' into dashmpd
Python 2.6 ElementTree compatibility
Update tests
Merge branch 'dashmpd-c' into dashmpd
Update version number
Increase stream count
Added itag 278
Merge branch 'dashmpd-c' into dashmpd
Tidyup
Merge branch 'dashmpd-c' into dashmpd
Remux audio downloads (gh-55 and gh-41)

This adds the remux parameter to the Stream download function.
If remux=True and ffmpeg or avconv are available, audio downloads
will be remuxed to fix some compatibility issues with the downloaded file.