Hierarchical plots all responses new EM plots

- Add: Generator/Reloader for hierarchical plots (vary ratio, show precision/em kappa for different item number)
fix hist_anguler_data
EM mixture sampling, new plot with resampled boostraps

- Add: Sample randomly from mixture model, using provided parameters
- Add: Experimental data now computes random average histograms and V-test for uniformity. Works for Bays2009 and Gorgo_simult.
- Add: Plots histograms for target and nontarget errors, like Fig 2 Bays. Adds random bootstrap resampled histograms on top (mostly flat…).
EM Mixture fitting with fixed kappa

- Add: New EM Mixture fitting with fixed kappa. Provide kappa and your new mixture will be done. All items components.