MNT: create both funpack and fmrib_unpack exes when generating notebook

funpack/scripts/generate_notebooks.py

@@ -16,6 +16,7 @@ import               os
 import               sys
 import               json
 import               shlex
+import               shutil
 
 import bash_kernel.install as bash_kernel_install
 
@@ -40,10 +41,11 @@ METADATA = {
 
 
 def create_funpack_executable():
-    with open('funpack', 'wt') as f:
+    with open('fmrib_unpack', 'wt') as f:
         f.write('#!/usr/bin/env bash\n')
         f.write(f'{sys.executable} -m funpack "$@"\n')
-    os.chmod('funpack', 0o755)
+    os.chmod('fmrib_unpack', 0o755)
+    shutil.copyfile('fmrib_unpack', 'funpack')
 
 
 def encode(imagefile):