• Cleanup directory structure, moved test.py to dateutil/tests/test.py
• Changed many aspects of dealing with the zone info file. Instead of a cache,
  all the zones are loaded to memory, but symbolic links are loaded only once,
  so not much memory is used.
• The package is now zip-safe, and universal-wheelable, thanks to changes in
  the handling of the zoneinfo file.
• Fixed tzwin silently not imported on windows python2
• New maintainer, together with new hosting: GitHub, Travis, Read-The-Docs