Upgrading version to 3.4.1-dev
Not reacting to onload events anymore if readyStateChange != 4

Fixes #164
Properly updating the file progress even when onprogress not firing (as in firefox)

Fixes #164
Downgraded mocha-phantomjs to play nice with mocha.
Added download files.
Upgrading version to 3.4.1 (Fixed Firefox progress update problems and travis.)
Merge tag 'v3.4.1'

Fixed Firefox progress update problems and travis.