Polishes some of the language in README.md

[bbultman]

Check it out.

I feel like the "goals of patata" section could be improved somewhat too, but I won't spend time on it unless you feel it's necessary. I assume you like it the way it is :-)

[coveralls]

Coverage remained the same at 84.444% when pulling 09bb6e3 on bbultman:refactor/language-updates into 7cb259c on eridem:master.

[eridem]

Thanks @bbultman