Remove the text shadowing on paragraphs

The text shadow makes the text look really blurry, especially on the text in the Usage section. Here's a comparison:

[With Shadow](http://inkling.github.io/Subliminal/)
[No Shadow](http://maxgabriel.github.io/Subliminal/)

(I'm on a retina MBP; not sure if that's exaggerating the difference.