Make file reader selection case insensitive by using ext.lower() and update...

Make file reader selection case insensitive by using ext.lower() and update config_text_reader.py to point to renamed dictionary.

pipelines/data_integration.py

@@ -30,7 +30,7 @@ except ModuleNotFoundError:
     print(':)')
     import src.hdf5_writer as hdf5_lib
     import utils.g5505_utils as utils
-    from instruments.readers import filereader_registry
+    from instruments import filereader_registry
 
 allowed_file_extensions = filereader_registry.file_extensions