fine-tuning of changes for serial

Author: Lupin3000

serial_plugin/__init__.py

@@ -1,3 +1,10 @@
+from .serial_base import SerialBase
 from .serial_command_runner import SerialCommandRunner
+from .serial_get_file_structure import FileStructure
+from .serial_get_version import Version
 
-__all__ = ["SerialCommandRunner"]
+
+__all__ = ["SerialBase",
+           "SerialCommandRunner",
+           "FileStructure",
+           "Version"]