Update token config (#4)

- Updated configuration files w/ special tokens (04c7faae76950335500370f9f73a9958bcdd0251)

special_tokens_map.json

@@ -45,5 +45,9 @@
     "⟨H≈1.6⟩",
     "⟨H≈1.7⟩",
     "⟨H≈1.8⟩"
-  ]
+  ],
+  "bos_token": "<|begin_of_text|>",
+  "eos_token": "<|end_of_text|>",
+  "pad_token": "[PAD]",
+  "unk_token": "[UNK]"
 }

tokenizer_config.json

@@ -440,8 +440,12 @@
     "⟨H≈1.7⟩",
     "⟨H≈1.8⟩"
   ],
+  "bos_token": "<|begin_of_text|>",
   "clean_up_tokenization_spaces": true,
+  "eos_token": "<|end_of_text|>",
   "extra_special_tokens": {},
   "model_max_length": 1000000000000000019884624838656,
-  "tokenizer_class": "PreTrainedTokenizer"
+  "pad_token": "[PAD]",
+  "tokenizer_class": "PreTrainedTokenizer",
+  "unk_token": "[UNK]"
 }