fix some bugs from previous merge

Don't always reuse

n_models_store now sets how many models to store (default still n_residual)

For the role descriptor

can set a maximum cross correlation for selected features

Properties now have units and postprocessing scripts avaiable

minor tweaks to output of Models and fixed a memory bug

basic analysis scripts completed

Using these expressions one can reconstruct features using the primary feature set
Capability to decompse features into the prevelance of primary features in them

Use keyed files to automatically generate bindings.hpp/bindings.cpp