Polish on unit tests. Add the logging redirect flag

CMakeLists.txt

README.md

TextToSpeech.cpp

test/CMakeLists.txt

test/FileTTSCacheTests.cpp

test/JingleMgrTests.cpp

test/PulseAudioSinkTests.cpp

test/TTSRunnerTests.cpp

test/TestDefines.hpp

test/test-assets/test.pcm

tts_library/CMakeLists.txt

tts_library/TTSRunner.cpp