Dev: unify version string used in setup.py and autotools

setup.py

@@ -2,9 +2,16 @@
 # Note that this script only installs the python modules,
 # the other parts of crmsh are installed by autotools
 from setuptools import setup
+import contextlib
+
+VERSION = '0.0.1'
+
+with contextlib.suppress(Exception):
+    with open('version', 'r', encoding='ascii') as f:
+        VERSION = f.read().strip()
 
 setup(name='crmsh',
-      version='4.5.0',
+      version=VERSION,
       description='Command-line interface for High-Availability cluster management',
       author='Kristoffer Gronlund, Xin Liang',
       author_email='XLiang@suse.com',