Migrate model card from transformers-repo

use full wiki_dpr instead of dummy

Update config.json

Update generator_tokenizer/merges.txt

Update generator_tokenizer/special_tokens_map.json

Update generator_tokenizer/tokenizer_config.json

Update generator_tokenizer/vocab.json

Update pytorch_model.bin

Update question_encoder_tokenizer/special_tokens_map.json

Update question_encoder_tokenizer/tokenizer_config.json

Update question_encoder_tokenizer/vocab.txt

Update config.json

Update generator_tokenizer/merges.txt

Update generator_tokenizer/tokenizer_config.json

Update generator_tokenizer/vocab.json

Update question_encoder_tokenizer/special_tokens_map.json

Update question_encoder_tokenizer/tokenizer_config.json

Update question_encoder_tokenizer/vocab.txt

Update config.json

Update generator_tokenizer/special_tokens_map.json

initial commit