Change history of «heavy breathing»

α	β	date	comment
		11 Jun'17 00:04
		11 Jun'17 00:26	edited to remove subtle but annoying 100 hz buzz when breathing out
		11 Jun'17 00:30	edited to add some randomness
		11 Jun'17 00:30	edited to add some randomness
		11 Jun'17 09:01	simplification
		11 Jun'17 21:02	edit description