PLOT_REIJNIERS2014 - plot scatter plots out of data from reijniers2014

Usage:

colorbar = plot_reijniers2014(dirs, values);
colorbar = plot_reijniers2014(dirs, values,'bias',bias);
plot_reijniers2014(dirs, values);
plot_reijniers2014(dirs, values,'bias',bias,'scatter');

Input parameters:

`dirs`	Normed source directions in cartesian coordinates
`values`	Arbitrary values corresponding to direction in dirs (e.g. error or probability density)
`bias`	optional, display arrows indicating the size and direction of local population response biases for different source positions
`target`	optional, display the target given in Cartesian coordinates as a small cross

Output parameters:

`c`	Colorbar of the plot to modify outside of this function.

Description:

Further, plot flags can be specified:

`'interp'`	Plot scattered interoplated data (default).
`'scatter'`	Plot only discrete scattered data instead of inter- polated scattered data.

References:

R. Barumerli, P. Majdak, R. Baumgartner, J. Reijniers, M. Geronazzo, and F. Avanzini. Predicting directional sound-localization of human listeners in both horizontal and vertical dimensions. In Audio Engineering Society Convention 148. Audio Engineering Society, 2020.