Minor fix in number of lat/lon for none square domains, added option to calculate potential incoming shortwave radiation
Re-added txt files with city names/locations
Added some code to analyse the IGCs and map/average thermals on lat/lon grid
Minor update on script to quickly plot domain positions
Re-added optino to plot cities on maps, added plot of fraction of incoming shortwave (solar) radiation
Added some colormaps
cleanup
Split OLGA settings into separate file to simplify development/personal settings