Changed Navigation between posts in tech blog.

Instead of Next and Prev, a short list of posts nearby the current one.
Fixed Cooking layout. Started on Index Page for site.

Making the index page for the site more approachable and provide a
larger overview of the content that is actually on the site itself.
Removed SiteMap from Index navigation.
Added cooking image to index page, styling.
Added old paper background tile to index.

Added link to about me as well.
Fixed up image for food.
Updated index page.