Metalinks Code

Real file download progress being reported for non-segmented downloads now

Real file download progress being reported now, not just block increments

Better display of bitrate when at megabit level

Added cancel checks to more places for faster stopping and less likelihood for errors, bugfix for downloading non-metalink files (default piece size)

sync with new metalink object methods from appupdater

Cancel callback fix

fixed IE proxy grabbing bug for non-windows platforms

some minor bugfixes

added bitrate/pause/cancel capability, based on file download average, this should probably be changed to a moving average in the future

Improved merge script to handle try/except cases and not double import