Sfeprapy

- SfePrapy is now in beta testing phase;
- New: Eurocode DIN Annex parametric fire curve is now available, force simulations to use only this fire curve by set `fire_type_enforced` to 2 (see new input file template); and
- New: Feature to find best fit distribution function - fire this tool by `python -m sfeprapy.dist_fit`.

- Improved: Able to combine individual time equivalence curves into one with corresponding `probability_weight` (see new input file template).

- New: Additional figure named `t_eq_merged.png` is produced to show merged time equivalency of all cases.

- Fixed: Final time equivalence plot legend text is set to case name. Previously '_out' was included.
- Improved: Final time equivalence plot will be produced without running any simulation, e.g. all `is_live` is set to 0.

- New: More configuration parameters can be defined in 'config.json' file located in the same folder as the selected input file;
- New: Optional MC simulation calculation for each case (as in the input *.csv file);
- New: beam_loc_z (beam element height), room_opening_permanent_ratio (permanent free window opening area);
- Improved: Plot background transparent.

- Additional returned results from the Monte Carlo simulation tool `sfeprapy.time_equivalence_core.grouped_a_b`. Window opening factor `opening_factor` is added to be returned from the function.
- `sfeprapy.time_equivalence.app` is now able to main_args a single simulation. When 'simulations=1' is defined, all distributed variables are disabled and mean or mean(upper, lower) is used for stochastic parameters.
- New testing input file 'benchmark_file_1' is added for single simulation testing, all other parameters are identical to 'benchmark_file_0'. Benchmark files are moved to validation folder, contained in root directory.