latest models (needs cleaned up still). Added optional output directory location relative to the current working directory

Update sample code for new FEW version. Populations file for sampling from a pre-defined population.

Nearest neighbour interp for rounded high-q values. New script to process dataframe-based raw data (as is now standard in the code)

Added diagnostics. Models and diagnostics now sit in their own directories. Script added for processing EMRI parameter space Pandas data.