Updated Python wrapper to include num_threads getter/setter
Updated Python wrapper to include num_threads getter/setter

Change-Id: Ib6df294e3d854eaa4b4a1dc5a3b7d376a9b3ef92

vmarkovtsev/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,Samsung/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction,vmarkovtsev/veles.sound_feature_extraction