Add Azure Emulator Control

In relation to this gist: https://gist.github.com/janekf/7908430 to control the Azure emulation while testing I suggest a new Task or "Component" for FAKE, the Azure Emulator.

In the FAKE Script I like to call

+ AzureEmulator.Run(StorageInstance)
+ AzureEmulator.Stop(StorageInstance)
+ AzureEmulator.Run(ComputeInstance)
+ AzureEmulator.Stop(ComputeInstance)