Added automated epoch recognition for Windows. (#798)

Unified regex expression for both, Linux and Windows.

mrcnn/model.py

@@ -2259,8 +2259,11 @@ class MaskRCNN():
         if model_path:
             # Continue from we left of. Get epoch and date from the file name
             # A sample model path might look like:
-            # /path/to/logs/coco20171029T2315/mask_rcnn_coco_0001.h5
-            regex = r".*/[\w-]+(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})/mask\_rcnn\_[\w-]+(\d{4})\.h5"
+	    # \path\to\logs\coco20171029T2315\mask_rcnn_coco_0001.h5 (Windows)
+	    # /path/to/logs/coco20171029T2315/mask_rcnn_coco_0001.h5 (Linux)
+
+	    regex = r".*[/\\][\w-]+(\d{4})(\d{2})(\d{2})T(\d{2})(\d{2})[/\\]mask\_rcnn\_[\w-]+(\d{4})\.h5"
+
             m = re.match(regex, model_path)
             if m:
                 now = datetime.datetime(int(m.group(1)), int(m.group(2)), int(m.group(3)),