more documentation and added build_code-file to compile descriptor and prior.

build_code

+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+cd $DIR/surrogate/prior
+python3 setup.py clean
+python3 setup.py build_ext --inplace --force
+
+cd $DIR/surrogate/descriptor
+python3 setup.py clean
+python3 setup.py build_ext --inplace --force
\ No newline at end of file

docs/installation/installation.rst

@@ -4,4 +4,41 @@
 Installation
 ============
 
+Requirements
+------------
+
+Python (only tested with 3.6.3)
+ASE (tested with 3.17 and newer)
+Cython (tested with 0.28 and newer)
+cymem (tested with 1.31.2 and newer)
+mpi4py (tested with 3.0 and newer)
+GPAW
+
+Install from source
+-------------------
+
+The code is avaliable as a tar-file here (you can get it using wget).
+
+After downloading the tar-file, unpack it using::
+
+    tar -xvf yourfile.tar
+    tar -zxvf yourfile.tar.gz
+
+Then run the build_code file inside the gofee-folder, to compile descriptor
+and prior-function, both used in the surrogate model. Do this using::
+
+    ./build_code
+
+This will compile the mentioned files for the python setup sources
+at the time of compiling.
+
+Finally when using the code, you need to have the gofee-folder in
+the PYTHONPATH. This is achieved using::
+
+    export PYTHONPATH=<path-to-folder>/gofee:$PYTHONPATH
+
+When this is done, and assuming you have a working GPAW installation, you
+can run python scripts calling GOFFE using::
+
+    mpiexec --mca mpi_warn_on_fork 0 gpaw-python script_calling_GOFEE.py