Load a language model and decode with it during evaluation

Based on !346 (merged)

Closes #252 (closed)

dan/ocr/manager/training.py

@@ -21,6 +21,8 @@ from torch.nn.parallel import DistributedDataParallel as DDP
 from torch.utils.tensorboard import SummaryWriter
 from tqdm import tqdm
 
+from dan.ocr.decoder import GlobalHTADecoder
+from dan.ocr.encoder import FCN_Encoder
 from dan.ocr.manager.metrics import Inference, MetricManager
 from dan.ocr.manager.ocr import OCRDatasetManager
 from dan.ocr.mlflow import MLFLOW_AVAILABLE, logging_metrics, logging_tags_metrics