path to fmri-analysis is inflexible

in layer_analysis.py: 

```
def import_fs_ribbon_to_func(fs_dir, analysis_dir, force=False):
[...]
            subprocess.run(
                [
                    "/data/p_02389/code/fmri-analysis/library/" + "import-fs-ribbon.sh",
[...]
```

Maybe simply with additional variable in the function or os.getenv 