New post about Tesseroids v1.1.1
Increased number of posts in front page
Using better figures and latex plugins

Had to convert tesseroids post and about page to rst. Tweaks to theme
css to support figures. Added latex plugin and needed code in base
template to load mathjax.
Merge pull request #7 from leouieda/tesseroids-1.1.1

New post about Tesseroids v1.1.1