Added wildcard support for Name parameter on Start-AzureVM and Stop-Azur...

Added wildcard support for the Name parameter on Start-AzureVM and Stop-AzureVM.

Example regular expressions supported:

// Starts all VM's in the service MyService
Start-AzureVM -Name * -ServiceName MyService

// Starts all VM's whose Name starts with "test" in the service MyService
Start-AzureVM -Name test* -ServiceName MyService 

// Starts all VM's whose Name ends with "test" in the service MyService
Start-AzureVM -Name *test -ServiceName MyService

// Stops all VM's in the service MyService
Stop-AzureVM -Name * -ServiceName MyService -Force

// Stops all VM's whose Name starts with "test" in the service MyService
Stop-AzureVM -Name test* -ServiceName MyService -Force

// Stops all VM's whose Name ends with "test" in the service MyService
Stop-AzureVM -Name *test -ServiceName MyService -Force