If we do not create the fromMarkers initialized with 'false' at the
start, then it may appear like all messages are received, because we
only check for false markers. But if there is not even the fromMarkers
array, then we do not see those 'false' markers.
This commit adds
- SmackReactor / NIO
- a framework for finite state machine connections
- support for Java 8
- pretty printed XML debug output
It also
- reworks the integration test framework
- raises the minimum Android API level to 19
- introduces XmppNioTcpConnection
Furthermore fixes SMACK-801 (at least partly). Java 8 language
features are available, but not all runtime library methods. For that
we would need to raise the Android API level to 24 or higher.
