Adds post install hook to the package.json

This will run bower install and bundle install commands once it
finished downloading node dependencies
Changes anchor's color in the post data and body
Changes underline and hover behaviour on the post links
Changes underline color for post content links

Also changes hover behaviour on the title link, it doesn’t underline
anymore
Changes post content font

Also it makes de archive links bigger and have an effect like de in
content post links
Merge branch 'categories-links'

Conflicts:
	css/main.css