Adding the sdk codeigniter and sdk files.
Merge branch 'master' of https://github.com/jonymusky/sdk-codeigniter-mercadopago
Update README.md
Update README.md

Style.
Update README.md
Add Rakefile to .gitignore
Merge branch 'master' of https://github.com/jonymusky/sdk-codeigniter-mercadopago
Add meli to .gitignore