bbfrederick/rapidtide: ## Version 2.2.0 - 3/11/22 checkpoint

(rapidtide) Major rethink of despeckling. Despeckling no longer causes negative correlation values when bipolar fitting is not enabled, and voxel parameters are only updated in a despeckled voxel if the correlation fit succeeds. This results in better fits without mysteriously unfit voxels. (showxy) Bland-Altman plots can now use alternative formatting, as per Krouwer, J. S. Why Bland–Altman plots should use X, not (Y+X)/2 when X is a reference method. Stat Med 27, 778–780 (2008). (fingerprint) This program is now substantially more useful, working on 4D input files. Output files are more convenient as well. (cleandirs) Cleandirs now keeps cleaning until it runs out of old installations to remove