Post_processing_outputs reinstation, Contourf_interpolate_data modified

- Fix: All post_processings done by Launchers can now return their locals(), making them available when working online.
- Fix: Computations_marginalfisherinfo_2d_nstim has been slightly changed.
- Fix: Contourf_interpolate_data is now handling masked parts of the space better. Can provide mask_x_condition() and mask_y_condition(), which returns True indices where X or Y should be masked. The dimensionality should work out with data_interpol.
Refactor output of compute_angle_error()

- Fix: Refactored output of sampler.compute_angle_error() to return a dictionary instead of a list now. More readable.
Circular statistics in utils, added paper plot

- Add: circular statistics functions are now in Utils.py instead of Sampler, more logical.
- Add: figures for the paper, with the 2d fisher info or 2 stim/2 feat.
Experimental data loading, Fit Paul's model with EM

- Added: Committed load_experimental_data now. Loads 3 datasets and computes some statistics. Could be used later to fit human experimental data directly. Data is still in private directory.
- Added: Converted Paul's Matlab JV10.m script in Python, simplified it a bit. Need to rerun for different starting points like Paul is doing as well.