Added an option to cancel the download
Oh my god I actually forgot to dispose this since I started this project
Fixed cancellation
Dispose resources correctly
Release of version 0.5.0
Merge branch 'cancel'

Conflicts:
	Changelog.txt
	YoutubeExtractor.nuspec
	YoutubeExtractor/YoutubeExtractor/Properties/AssemblyInfo.cs
Merge branch 'master' of github.com:flagbug/YoutubeExtractor