Fix attribute errors and filing csvs

[xmedr]

Overview

All of the content-dispositions when looking for filenames as of late have been either of type str or None. So the decode() method that has been in use has been raising AttributeErrors. This branch accounts for the content-disposition being a string, and passes the filename found within.

After resolving that error, jq had issues parsing out the files attributes of objects in filing.json to a csv since they were nested objects. This branch also flattens out that object with a make command to get the csv working.

• Closes #12

Testing Instructions

• Run make lm20.db or look at the checks performed on this PR
• Confirm that everything in the "build database" portion runs without the str attribute error
• Confirm that the data in the db is what we expect

[xmedr]

This still errors out when the content-disposition is None, but the command would still continue to run. I imagine this can return something more useful in that case, but was unsure what that would be since no content would mean no file. What do you think @fgregg?

[fgregg]

@xmedr let's do something like

       content_disposition = headers.get("Content-Disposition")
       if content_disposition:
           _, params = cgi.parse_header(content_disposition)
            filename = params["filename"]

            media_ext = os.path.splitext(filename)[1]
        else:
            media_ext = ""

[xmedr]

awesome, ty for those suggestions i've got them in!