ENH: new helper function create_cg creates curvilienar grid used in plot_cg_ppi and plot_cg_rhi plot_cg_ppi and plot_cg_rhi changed accordingly
ENH: new helper function create_cg
creates curvilienar grid
used in plot_cg_ppi and plot_cg_rhi
plot_cg_ppi and plot_cg_rhi changed accordingly

heistermann/wradlib,wradlib/wradlib,wradlib/wradlib,kmuehlbauer/wradlib,kmuehlbauer/wradlib,heistermann/wradlib