added fileserver test
Merge branch 'master' of https://github.com/QuickOrBeDead/Labo.DownloadManager

Conflicts:
	Labo.DownloadManager/DownloadTask.cs
	Labo.DownloadManager/Protocol/INetworkProtocolProvider.cs
	Labo.DownloadManager/Protocol/Providers/FtpProtocolProvider.cs
	Labo.DownloadManager/Protocol/Providers/HttpProtocolProvider.cs
resolving conflicts