doc tweak
bugfix

names should be defined before you reference them, usually.
bugfix

names should be defined before you reference them, usually.
whitespace and style cleanup

no functional changes
Add new classes to names.py
bumps updates
Docstring updates, sld method

This sld method for EndTetheredPolymer allows the class instance to be
used as a "material" in the "above" slot of freelayer. This is
convenient since roughness is not.
remove sld method

was buggy, developing on private branch