Update PACER parsers to include office code, judge initials, and defendant number

[mlissner]

In freelawproject/courtlistener#4240, we're adding these fields to the DB. Let's start parsing them out of the HTML too.

Our iquery parser is the top priority here, but really we'll want all of our parsers upgraded.

[flooie]

I would like to add one more thing. I think we should include case type as a code

[flooie]

we get the benefit of now being able to re-create the full docket number AND we can sort pacer cases by type - which we really should be able to do.

[mlissner]

You mean the docket letters?

[flooie]

-cv- -cr- -po- -mj- ?

[mlissner]

Yeah, OK.