Use a GitHub avatar when gravatar fails.
Omit needless domain sharding number.
Added all contributors.
[website] new contributors.
Omit redundant LICENSE.
Inform when a vendor is nonresponding.
Add option to show PyPI downloads from last_week and last_day

In addition to /pypi/dm, users can use /pypi/dw and /pypi/dd for more
detailed download counts.
Using Redis to store analytics on Heroku.