Migrate model card from transformers-repo

Read announcement at https://discuss.huggingface.co/t/announcement-all-model-cards-will-be-migrated-to-hf-co-model-repos/2755
Original file history: https://github.com/huggingface/transformers/commits/master/model_cards/lanwuwei/GigaBERT-v3-Arabic-and-English/README.md

README.md

@@ -1,3 +1,13 @@
+---
+language:
+- en
+- ar
+datasets:
+- gigaword
+- oscar
+- wikipedia
+---
+
 ## GigaBERT-v3
 GigaBERT-v3 is a customized bilingual BERT for English and Arabic. It was pre-trained in a large-scale corpus (Gigaword+Oscar+Wikipedia) with ~10B tokens, showing state-of-the-art zero-shot transfer performance from English to Arabic on information extraction (IE) tasks. More details can be found in the following paper:
 
@@ -8,11 +18,10 @@ GigaBERT-v3 is a customized bilingual BERT for English and Arabic. It was pre-tr
   	  year       = {2020}
   	} 
 
-## Download
+## Usage
 ```
 from transformers import *
 tokenizer = BertTokenizer.from_pretrained("lanwuwei/GigaBERT-v3-Arabic-and-English", do_lower_case=True)
 model = BertForTokenClassification.from_pretrained("lanwuwei/GigaBERT-v3-Arabic-and-English")
 ```
-Here is downloadable link [GigaBERT-v3](https://drive.google.com/drive/u/1/folders/1zgUXz8FQPHmWVNR7tHyPq1E6SmrMuPv6).
-
+More code examples can be found [here](https://github.com/lanwuwei/GigaBERT).