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.
Also add MucConfigFormManager and improve the MUC API (SMACK-648). Bump
to jxmpp 0.5.0-alpha3.
Improve and extend PrivateDataManager and BookmarkManager.