Add the start debugger script used in the docker images to source control (#381)
Add the start debugger script used in the docker images to source control (#381)

This also updates the script to wait on the users application instead of the debugger.

Fixes #380 and #364
GoogleCloudPlatform/google-cloud-dotnet-debugger,GoogleCloudPlatform/google-cloud-dotnet-debugger,GoogleCloudPlatform/google-cloud-dotnet-debugger,GoogleCloudPlatform/google-cloud-dotnet-debugger