ratios_and_interpolations: added some details abut what constitutes the driver function and what one needs to modify
ratios_and_interpolations: move old implementations to *_MK1.R filenames
ratios_and_interpolations: move old implementations to special DEPRECATED directories
ratios_and_interpolations: rename experimental MK2 implementations
ratios_and_interpolations: correct silly typo in saving routine
ratios_and_interpolations: mv from mk2 versions of the various routines to their new names
analysis_etass_Ds: adjusted formatting and added lattice spacing coefficients to legend