Add post hiring rails dev

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
Add facebook remarketing tag. Update blog post rails dev. Add barra header estamos contratando.
Merge branch 'master' of github.com:startae/startae-blog into develop

Conflicts:
	source/2014-06-25-estamos-contratando-rails-developer.slim
header update