Gems update

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
Meta tags update

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
Add thumbnail blog post rafael maior

Signed-off-by: Renato Carvalho <renatolz@gmail.com>
Blog post ultima chamada oficina rails

Signed-off-by: Renato Carvalho <renatolz@gmail.com>