fixed setup

setup.py

@@ -25,15 +25,17 @@ def compile_documentation():
     if docutils is None:
         return htmlfiles
 
-    dst = pathlib.Path('./gitlab_todotxt/docs')
+    src = pathlib.Path('./doc')
+
+    dst = pathlib.Path('./gitlab_todotxt/doc')
     dst.mkdir(exist_ok=True)
     
     pathlib.Path('./man').mkdir(exist_ok=True)
 
     man_pter = None
 
-    if None not in [docutils, manpage]:
-        for fn in pathlib.Path('./doc').iterdir():
+    if None not in [docutils, manpage] and src.exists():
+        for fn in src.iterdir():
             if fn.suffix == '.rst':
                 if fn.stem == 'pter':
                     man_pter = str(fn)