UweSchnepf/MPA: MPA v1.1.1 releaesed

This release further increases the customization of the plots and harmonizes function argument names.

Change log:

draw_KronerCarbo:

• Changed the appearance of the legend and y-axis defaults of the function
• Changed the default color of the theoretical curve to lightblue.

draw_dist:

• Added argument col_y2 to set the color of the axis independently from the dots in the plotting area.
• Renamed ylab2 to y2lab for consistency.
• Changed the default color for normalized frequency to lightblue.