Make __version__ available in the whole module

This shortens the include from "from .__version__ import __version__"
to "from . import __version__" within the module.

Signed-off-by: Claudius Heine <ch@denx.de>

setup.py

@@ -23,7 +23,7 @@
 from setuptools import setup, find_packages
 from os import path
 
-from kas.__version__ import __version__
+from kas import __version__
 
 __license__ = 'MIT'
 __copyright__ = 'Copyright (c) Siemens AG, 2017'