`specklecp.py` - [ ] [TODO histogram to bincount, change error bar calc](https://github.com/NSLS-II/pyCHX/blob/2ecdacf0dd8496dd8e90bb4975273b59e1d08e26/pyCHX/v2/_commonspeckle/chx_specklecp.py#L641-L642) --> [v1 source](https://github.com/NSLS-II/pyCHX/blob/2ecdacf0dd8496dd8e90bb4975273b59e1d08e26/pyCHX/chx_specklecp.py#L435-L436); looks like histogram was done, not sure about error bar
