Merge pull request #178 from nicoddemus/frozen-version

Always define __version__ even if get_distribution() fails

Author: nicoddemus

pytest_html/__init__.py

@@ -5,6 +5,6 @@
     __version__ = get_distribution(__name__).version
 except DistributionNotFound:
     # package is not installed
-    pass
+    __version__ = 'unknown'
 
 __pypi_url__ = 'https://pypi.python.org/pypi/pytest-html'