Add Openshift

Now I will add one app per day, today is Openshift, open source enterprise PaaS powered by Red Hat

README.md

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 * [Eucalyptus](https://www.eucalyptus.com/) - Open source private cloud software with AWS compatibility.
 * [Mesos](http://mesos.apache.org/) - Develop and run resource-efficient distributed systems.
 * [OpenNebula](http://opennebula.org/) - An user-driven cloud management platform for sysadmins and devops.
+* [Openshift](http://www.openshift.org) - OpenShift is a platform as a service product from Red Hat.
 * [OpenStack](https://www.openstack.org/) - Open source software for building private and public clouds.
 * [The Foreman](http://theforeman.org/) - Foreman is a complete lifecycle management tool for physical and virtual servers. FOSS.
 * [Tsuru](https://tsuru.io) - Tsuru is an extensible and open source Platform as a Service software.