Changing to use HttpClient
Merge branch 'master' of https://github.com/gtrifonov/azure-sdk-tools

Conflicts:
	WindowsAzurePowershell/src/Management.Test/MediaServices/Class1.cs
	WindowsAzurePowershell/src/Management.Test/MediaServices/SimpleMediaServiceManagement.cs
	WindowsAzurePowershell/src/Management.Utilities/MediaService/Services/IMediaServiceManagement.cs
	WindowsAzurePowershell/src/Management.Utilities/MediaService/Services/MediaServicesExtensionsMethods.cs