implement serializable to archive GEAR scrape results

[Hunter-Buckhorn]

Currently, the program scrapes the GEAR each time it runs.

Have the GEAR-scraper class implement Serializable and add in a way to check to see if we are in the correct year of GEAR before scraping the URL.
If we are: load the serialized data for the year if it exists.
If we are not: scrape from the GEAR url and serialize this data.

Save the serialized data by year so that previous years of GEAR can be found and loaded if they have been serialized and saved before.

Estimated 200 points.

[arda-]

W16 OK