Korman doesn't support Blender's script reload function

Blender supports reloading scripts by pressing F8, but Korman currently does not work with this feature. It would useful to have this working for quicker iteration during development.

 Exception in module register(): 'Blender\2.78\scripts\addons\korman\__init__.py'
 Traceback (most recent call last):
   File "Blender\2.78\scripts\modules\addon_utils.py", line 350, in enable
     mod.register()
   File "Blender\2.78\scripts\addons\korman\__init__.py", line 38, in register
    bpy.utils.register_module(__name__)
   File "Blender\2.78\scripts\modules\bpy\utils\__init__.py", line 667, in register_module
     raise Exception("register_module(%r): defines no classes" % module)
 Exception: register_module('korman'): defines no classes