Major Fixes:
* Update `available_realtime` method to handle latest NDBC buoy web page format
Major Changes:
* Update handling of station metadata as `pd.DataFrame` (default `dict` behavior remains unchanged) 20 21
* New example notebook 20 21
* Updated documentation 24
* Validated tests 21
Minor Changes:
* Improved docstrings where needed
* Cleaned `README.md`
* Updated PyPi versions and contact information