Add mechanisms for formulas functions to reshape their tables.
Add steps infos to simulations and entities.
Rename "compute" function to "calculate". Function "compute" now returns a holder and function "calculate" returns an array.
Add debug option to simulations (to show arguments and results of formulas). Repair calls to "compute" functions.
Add method Holder.new_test_case_array.
Remove _option from functions parameters. Differentiate persons-specific entities.
Set default Simulation.steps_count to 1. Add new method Simulation.new_holder.
Accept multiple decomposition formats.