WEB: Styling blog
Improving how the blog section looks. Changing a bit the font size, color, and spacing. And also removing html tags from the content, since it's tricky to make titles, images, links... in the posts look good in the preview.

Not convinced that the blog looks great, but that's the best I could do, and I think it looks much better than what we've got now.

![Screenshot at 2020-01-17 00-17-27](https://user-images.githubusercontent.com/10058240/72573847-e418e580-38be-11ea-9ba8-f3b252aacd48.png)
