a cleaner way to define version

doc/conf.py

@@ -19,6 +19,7 @@
 #
 import os
 import sys
+from ess import __version__
 sys.path.insert(0, os.path.abspath('../'))
 
 # -- General configuration ------------------------------------------------
@@ -67,9 +68,9 @@ author = 'Ryoichi Miyamoto, Yngve Levinsen, Mamad Eshraqi'
 # built documents.
 #
 # The short X.Y version.
-version = '2'
+version = __version__
 # The full version, including alpha/beta/rc tags.
-release = '2.2'
+release = version
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

ess/__init__.py

 __all__ = ["fieldmap", "installed", "lib_tw", "SP_Relativity", "TraceWin" "TTF"]
+__version__ = '2.2'
 from . import TraceWin
 from . import installed
 from . import lib_tw

setup.py

 from distutils.core import setup
+from ess import __version__
 
 setup(name='ESS Python Tools',
-    version='2.2',
+    version=__version__,
     description='ESS Related Tools for Python',
     url='http://ess-bp.pages.esss.lu.se/ess-python-tools',
     author='Yngve Levinsen',