Add pitch smoothing (#98) #716

Job	Run time
clippy - Ubuntu	38s
stable - Ubuntu - debug	1m 47s
rustfmt	12s
clippy - Windows	1m 1s
stable - Debian (cross to Windows) - debug	1m 3s
stable - Ubuntu - release	1m 49s
stable - Debian (cross to Windows) - release	1m 13s
beta - Ubuntu - debug	2m 13s
beta - Debian (cross to Windows) - debug	1m 4s
stable - Windows - debug	3m 3s
stable - Windows - release	3m 20s
beta - Windows - debug	3m 0s
Publish Wiki	12s
	20m 35s

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