Make native classes available for import

Author: sanders41

prelude_parser/__init__.py

@@ -1,4 +1,7 @@
 from prelude_parser._prelude_parser import (
+    SiteNative,
+    SubjectNative,
+    UserNative,
     parse_site_native_file,
     parse_site_native_string,
     parse_subject_native_file,
@@ -17,4 +20,7 @@
     "parse_user_native_string",
     "parse_to_classes",
     "parse_to_dict",
+    "SiteNative",
+    "SubjectNative",
+    "UserNative",
 ]