Added version info (#18)

* Added version information to the module via pbr.

* Added tests for module version availability.

dkey/__init__.py

@@ -10,6 +10,20 @@
 ====
 Function to generate deprecated keys.
 
+__version__
+===========
+A string indicating which version of dkey is currently used.
+
+version_info
+============
+A tuple containing the currently used version.
+
 """
 from ._dkey import deprecate_keys as deprecate_keys
 from ._dkey import dkey as dkey
+
+from pbr.version import VersionInfo
+
+_v = VersionInfo('mgen').semantic_version()
+__version__ = _v.release_string()
+version_info = _v.version_tuple()

tests/test_dkey.py

@@ -6,6 +6,12 @@
 
 from dkey import deprecate_keys, dkey
 
+class version_test_case(unittest.TestCase):
+    def test_version_string_available(self):
+        import dkey as dk
+        self.assertTrue(hasattr(dk, '__version__'))
+        self.assertTrue(hasattr(dk, 'version_info'))
+
 class dkey_test_case(unittest.TestCase):
     def test_number_of_keys_incorrect(self):
         with self.assertRaises(ValueError):