Compile NEMO, XIOS and tools

To build the NEMO, XIOS and TOOLS executables the following scripts should be followed in order (Edit make_paths.sh as necessary). The scripts are in SCRIPTS directory. E.g. bash$. ./make_paths.sh

cd SCRIPTS 
. ./make_paths.sh 
. ./make_directories.sh 
. ./make_xios.sh
. ./make_nemo.sh

These are executed before the domain file is made so some of the tooling and directory structures can be reused.