Extract Gemnasium data from SVG image.

Fixes issue #148.
Explain how to use alternate ports in INSTALL.md

`npm start` doesn't work with either approach (don't ask me why), so I changed the default steps to use `node server` to reduce confusion.
Code Climate coverage integration.

Fixes #151.
Code climate coverage example.
Support for Packagist License.

Fixes #152.
Demo of Packagist license information.
Use word "coverage" for code climate coverage.
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.
Ignore the Redis folder.
Document the use of week and day downloads for PyPI
Avoid sending data when vendor server unresponsive.
Vendor request timeout set at 25s.
Add a route for Chef cookbooks