Stub out remaining_disk to avoid test pollution

Signed-off-by: Phan Le <ple@pivotallabs.com>
Switch to v2 of the loggregator gem, also add shared_secret to emitter config
emit staging logs with a special STG emitter
Fixed a typo that stop DEA starting up

Signed-off-by: Phan Le <ple@pivotallabs.com>
Add support for Windows with .NET Warden.