deleting stuff and changing readme

README.md

build/cmake/CMakeLists.txt

build/cmake/be.cmake

build/cmake/ida.cmake

build/cmake/kinsol.cmake

build/cmake/load_modules.sh

build/makefiles/Makefile_Summa

build/makefiles/compile_copernicus.sh

build/makefiles/compile_graham.sh

build/makefiles/makefile

build/makefiles/makefile_apptainer

build/makefiles/makefile_cluster

build/makefiles/makefile_herschel

build/makefiles/makefile_old_summa

build/makefiles/makefile_richardson

build/makefiles/makefile_sundials