update timeframe evaluate.py

[keighrim]

Because

Related to #43 , we want to update now outdated evaluate.py under TF_eval directory. However, since the time when the script is written, there has been some changes regarding gold data organization. So we need to updated the script to cope with those changes.

Done when

This should include

1. updating to use goldretreiver.py instead of manual download of gold files

   • example of usage of the goldretriver
     

     aapb-evaluations/ocr_eval/evaluate.py

     Line 153 in 55b53e8

     ref_dir = goldretriever.download_golds(GOLD_URL) if args.gold_dir is None else args.gold_dir

   • should copy or symlink the goldretriver.py first

   $ cd timeframe-eval 
   $ ln -sf ../goldretriever.py

2. merging following two functions
   

   aapb-evaluations/timeframe-eval/evaluate.py

   Line 56 in 55b53e8

   def load_slate_gold_standard(tsv_file_list, test_dir):

   
   

   aapb-evaluations/timeframe-eval/evaluate.py

   Line 76 in 55b53e8

   def load_chyron_gold_standard(csv_file_list, test_dir):

   • the "gold" files for chyron and slate annotation have been updated since the original eval.py script is written.
   • old chyron gold
   • current chyron gold
   • old slate gold
   • current slate gold

3. Update start and end properties access with newly added helper methods via adding helpers for getting anchor points mmif-python#254

Additional context

No response