Readme links to Miss Manners benchmark implementation are wrong

[vduseev]

Links point to the incorrect location, e.g.

* [Python](https://github.com/jruizgit/rules/blob/testpy/manners.py)

instead of

* [Python](https://github.com/jruizgit/rules/blob/master/testpy/manners.py)

which leads users to 404 page.