replace 'none' with None
better auto-discovery of independent variables and parameter names, but still customizable
better independent_vars/param_names and passing existing tests
python3 fix -- dict.keys() to list
rename utilfuncs.py to basicmodels.py
rename models1d.py to old_models1d.py
refactor: move specified_models to models
refactor: move specified_models to models
add Models suffix to all models
updating docs for models
updating docs for models
fix example model
refactor: was basicmodels.py now lineshapes.py
doc improvements
working composite models
greatly simplified subclassed models
remove print statement from tests
initial working version of guess_starting_values(), at least for some Models
improve test for missing parameters, allowing extra
improve starting guess