Rename files to end in .pdf, to make it clear they are files

[peterdietz]

I think it looks a bit awkward for the sample CSV to not have filenames with file format endings, so I added .pdf to each file, and then regenerated new PDF's to match each filename.

Previously it was:

filename	dc.title
Alabama	Alabama
Alaska	Alaska

And now it is Alabama.pdf, Alaska.pdf, ...

Here's the little python script I ran to generate a new PDF for each row, with contents of each PDF to say the state name. It's unimportant, but I'll leave it here.

from fpdf import FPDF
import pandas as pd

df = pd.read_csv('AAA_batch-metadata.csv')
for index,row in df.iterrows():
  name=row[1]
  pdf = FPDF()
  pdf.add_page()
  pdf.set_xy(0,0)
  pdf.set_font('arial', 'B', 13.0)
  print(name)
  pdf.cell(ln=0,  h=5.0,  align='L', w=0, txt=name, border=0)
  pdf.output(name+'.pdf',  'F')