Move fsm stuff to a separate directory in lib

lib/tfw/__init__.py

@@ -2,6 +2,4 @@
 # All Rights Reserved. See LICENSE file for details.
 
 from .event_handler_base import EventHandlerBase, FSMAwareEventHandler, BroadcastingEventHandler
-from .fsm_base import FSMBase
-from .linear_fsm import LinearFSM
-from .yaml_fsm import YamlFSM
+from .fsm import FSMBase, LinearFSM, YamlFSM

lib/tfw/fsm/__init__.py

@@ -0,0 +1,6 @@
+# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
+# All Rights Reserved. See LICENSE file for details.
+
+from .fsm_base import FSMBase
+from .linear_fsm import LinearFSM
+from .yaml_fsm import YamlFSM

lib/tfw/fsm/yaml_fsm.py

@@ -9,7 +9,7 @@ import yaml
 import jinja2
 from transitions import State
 
-from tfw import FSMBase
+from .fsm_base import FSMBase
 
 
 class YamlFSM(FSMBase):