Persistence defaults are now registered in the settings so that we can
override them easier. Sagas are now a "feature" that we can
disable/enable.
The Lite profile and Volatile() configuration now sets the default to
InMemory persistence
Displaying current feature status on startup
Message driven subscriptions is now a feature so that we can better
control it
Consolidated the subscription storages under the corresponding
/Persistence folder
The gateway is now a feature. Settings are now also locked for
modification after the "before finalize" step
Removed the ActiveMq subscription storage since its not relevant anymore