Latest version is incompatible with plotting via PyPlot

[dilaraabdel]

Trying out the TexturedPerovskiteSolarCells.jl repository script with a latest ChargeTransport.jl version and visualizing with PyPlot currently fails ...

[pjaap]

With WIAS-PDELib/GridVisualize.jl#116 the scripts run fine on my end.

The only adjustment in needed in TexturedPerovskiteSolarCells.jl is then to remove a few figure() calls when a function from ct_plotting is used right afterwards.

[pjaap]

@dilaraabdel can you confirm this? Otherwise a detailed script execution instruction would be great.