fixed a bug preventing .wav files containing non-data chucks to be loaded correctly
Make the new wrappers imported from iCub repository compiled by default
improved example/portaudio/sound_sender_file
added += operator to yarp::sig::Sound
sound_sender_file fixed if --filename param is missing
improved example sound_sender_mic
added yarp::sig::Sound::subSound()
New implementation for the portaudio device driver using callback and ring buffers
adding parser for xml --> doxygen
revised doc
linking tutorials