fdpoll will now run a callback when about to sleep / woke up.
A new Java interface to indicate server started / sleeping / waking up.
An android implementation may allow the CPU to sleep.
If there's a java exception the server will try to shutdown.
Calling servald stop is currently undefined.
Add stateful class to represent the state of the serval daemon, shifting some functions from BatPhone
Add convenience functions to get pre-configured MDP and HTTP Restful client classes