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Client-initialized close is accepted by server and client waits for acknowledge before closing connection

# Conflicts:
#	include/ITANetAudioStreamingClient.h
#	src/ITANetAudioStreamingClient.cpp

bugfix close connection + es werden immernoch zuviele daten geschickt, der inclommingvector wird zu groß

log im server implementieren

Conflicts:
	tests/NetAudio/ITANetAudioStreamingServerTest.cpp

# Conflicts:
#	tests/NetAudio/ITANetAudioStreamingClientTest.cpp
#	tests/NetAudio/ITANetAudioStreamingServerTest.cpp