use modern, safe and fast ciphers
 Merge branch 'update-ciphers-nginx' into 'master'

Update Ciphers Nginx

The current suggested Ciphers do not qualify anymore as completely safe, see for instance [here.](https://community.qualys.com/blogs/securitylabs/2013/03/19/rc4-in-tls-is-broken-now-what)

This updates the ciphers, following [Remy's advise](https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html).
making fixes to ensure we're telling folks to use at least postgresql-server 9.3 as extenions are not supported in 8.x and therefore bundle exec rake gitlab:setup RAILS_ENV=production would fail otherwise
fixing readme spacing
Merge branch 'master' of github.com:gitlabhq/gitlab-recipes
Fixed typo
Merge pull request #212 from nukepuppy/master

Ensure we're using at least pgsql 9.1 for extensions to work during gitlab:setup
Merge pull request #215 from SchadLucas/master

Fix typo
Merge remote-tracking branch 'gitlabhq/master'

Conflicts:
	install/centos/README.md