Renamed LISSOM sheet class SettlingCFSheet (and similarly for LISSOM_Opt) and moved it out of sheet.lissom, to reflect its usage in multiple algorithms
Removed outdated references to LISSOM sheet class
Removed outdated references to LISSOM sheet class
Removed confusing default output_fn from SettlingCFSheet, making the default PiecewiseLinear output_fn only be defined for the LISSOM sheet class (for backwards compatibility)
Removed apparently unused JointScaling sheet
Added legacy support for JointScaling to allow pickles to load