Make "NONE" checks case-insensitive

src/imcflibs/imagej/shading.py

@@ -121,7 +121,7 @@ def process_folder(path, suffix, outpath, model_file, fmt):
     fmt : str
         The file format suffix for storing the results.
     """
-    if model_file in ["-", "NONE"]:
+    if model_file.upper() in ["-", "NONE"]:
         model = None
     else:
         model = ij.IJ.openImage(model_file)

src/imcflibs/pathtools.py

@@ -171,7 +171,7 @@ def derive_out_dir(in_dir, out_dir):
     str
         The full path to the directory to be used for output and temp files.
     """
-    if out_dir in ["-", "NONE"]:
+    if out_dir.upper() in ["-", "NONE"]:
         out_dir = in_dir
         log.info("No output directory given, using input dir [%s].", out_dir)
     else: