Update gems to latests releases

Remove extra gem dependencies.
Update normalize to v3
Remove neat
Remove bourbon
Remove bourbon and neat dependencies
Clear all the css from the blog
Add new drafts folder
Remove all unused variables
Add more header attributes.
Remove unused stuff from the page header
New navbar
New header mobile first!
Update ruby to my latest
Add .bundle to gitignore
Remove post limit
Better styling of the posts
Bluer links
More margin to the navbar
Add last child list element a little margin
Remove the "justify" text from the body

I've remove this rule to apply them as per element.