Initial import of 'centos-ruby' image based on SCL and puma
Updated the default port for Puma to be 9292
Merge extended-mysql and extended-pgsql into extended image
Removed unnecessary /bin/sync from save-artifacts
Do not install puma server manually, but use it from bundle.
Merge pull request #15 from mfojtik/centos-ruby

Initial import of 'centos-ruby' image based on SCL and puma