Merge pull request #184 from Microsoft/cwatsonMSFT-patch-1

Added pre-release VM article back into TOC.

virtualization/hyperv_on_windows/TOC.md

@@ -15,6 +15,7 @@
 ## [Work with Checkpoints](user_guide/checkpoints.md)
 ## [Export and Import Virtual Machines](user_guide/export_import.md)
 ## [Connect with PowerShell Direct](user_guide/vmsession.md)
+## [Create pre-release VMs](user_guide/create_pre-release_vm.md) 
 # Manage the Hyper-V Hosts
 ## [Manage Remote Hyper-V Hosts](user_guide/remote_host_management.md)
 ## [Enable Nested Virtualization](user_guide/nesting.md)
@@ -26,4 +27,4 @@
 ## [Hyper-V PowerShell](https://technet.microsoft.com/library/hh848559.aspx)
 ## [Hyper-V WMI Provider (V2)](https://msdn.microsoft.com/library/hh850319.aspx)
 ## [Hyper-V Architecture](https://msdn.microsoft.com/en-us/library/cc768520(v=bts.10).aspx)
-## [Hypervisor Specifications](develop/tlfs.md)
+## [Hypervisor Specifications](develop/tlfs.md)