Implement -DeleteVHD for Remove-AzureVM, & Remove-AzureDeployment, -DeleteAll for Remove-AzureService
bump up the version header
add help message
Update Update-AzureVM
Change implementation on Remove-AzureDataDisk | Update-AzureVM
Add null checking for DataVirtualHardDisksToBeDeleted collection
Fix a long operation issue on DeleteDataDisk operation
Merge branch 'dev' of https://github.com/huangpf/azure-sdk-tools into vip

Conflicts:
	WindowsAzurePowershell/src/Commands.ServiceManagement/HostedServices/RemoveAzureDeployment.cs
	WindowsAzurePowershell/src/Commands.ServiceManagement/IaaS/PersistentVMs/RemoveAzureVM.cs
	WindowsAzurePowershell/src/Commands.ServiceManagement/Properties/Resources.resx