Select function
To simplify the drspine use it would be good to have a command that SELECTS from all read-in data those records that pertain to a specific sample in a specific state (e.g. Temperature). As parameters value and acceptance band shall be used. Further either while reading, or in future data formats or by some kind of "intelligent" pattern matching the roles of the loaded records are detected and taken into account. While sample data are SELECTED matching shall pair them with the fitting backgrounds and references (if available). In full operation this feature should allow the user to unspecific (i.e. without brain) read in all data that was produced (and maybe some other resolutions) and DrSpine may even automatically detect the different sample (states) and perform matching and evaluation for each of these states without e.g. mixing temperatures, concentrations, samples into one S(Q,t) but jsut delver a valid S(Q,t,{T,c,..}) for each sample(state).