1. Create pandas_extensions.py

2. Remove unused imports

Signed-off-by: Matthew Stidham <stidmatt@gmail.com>

py-scripts/ftp_html.py

@@ -1,7 +1,6 @@
 #!/usr/bin/env python3
 
 from matplotlib import pyplot as plt
-from datetime import datetime
 import numpy as np
 import os.path
 from os import path