Update config.yml.example

Due to SSLv3 vulnerability, added explicit ssl protocols list.
Merge pull request #15 from paoolo/patch-1

Update config.yml.example
Update README.md

Update README due to #15.
Merge pull request #16 from paoolo/patch-1

use TLSv1 TLSv1.1 TLSv1.2
Update config.rb

Due to #15.
Merge pull request #17 from paoolo/patch-2

TLSv1 TLSv1.1 TLSv1.2 in default nginx config
Fix config used in spec, added explicit ssl protocols list
Merge branch 'master' of github.com:paoolo/redirus