feat(mass, massappct): backscraper for masscases.com

[grossir]

Helps solve #984

[grossir]

I have put the backscraper on the same file as the scraper, even when it targets a different source. After finishing it, I actually think the backscraper should be on its own file, because it targets a different site, and uses an exclusive extract_from_text. What do you think? Maybe juriscraper/opinions/united_states/state/mass_backscraper.py?

I normally wouldn't use juriscraper/opinions/united_states_backscrapers/mass.py since it is awkward to have two folders for what is basically the same thing (scraping opinions past or present), but in this case it seems it could also be a proper place for the scripts...

[mlissner]

One of the reasons I liked the united_states_backscraper directory is because you can put one-off scripts in there and not worry too much if they go stale or stop working.

[flooie]

I tested this today and found it crashed

Traceback (most recent call last):
  File "/Users/Palin/Code/juriscraper/sample_caller.py", line 246, in main
    for site in site_yielder(
  File "/Users/Palin/Code/juriscraper/juriscraper/lib/importer.py", line 79, in site_yielder
    site._download_backwards(i)
  File "/Users/Palin/Code/juriscraper/juriscraper/opinions/united_states_backscrapers/state/mass.py", line 103, in _download_backwards
    self._process_html()
  File "/Users/Palin/Code/juriscraper/juriscraper/opinions/united_states_backscrapers/state/mass.py", line 55, in _process_html
    _, date_filed_str, name = row.xpath("td/text()")
ValueError: too many values to unpack (expected 3)

on the live site after a few iterations when it gets to 2024-07-02 12:24:55,029 - INFO: Now downloading case page at: http://masscases.com/425-449.html