util-scl/oo-mco: Added error message when scl mco does not exist.

Bug 1131139
Bugzilla link https://bugzilla.redhat.com/show_bug.cgi?id=1131139
oo-mco is installed on nodes due to rpm configuration, however the scl mco executable is not. Added error message to avoid confusion for newer administrators.
Update README.md and create a man page from that
Add manpage to rpm
Automatic commit of package [rubygem-openshift-origin-node] release [1.30.3-1].
Automatic commit of package [openshift-origin-cartridge-jbosseap] release [2.20.2-1].
Automatic commit of package [openshift-origin-cartridge-jbossews] release [1.28.2-1].
Automatic commit of package [rubygem-openshift-origin-admin-console] release [1.25.2-1].
Automatic commit of package [openshift-origin-cartridge-mysql] release [1.27.3-1].
Automatic commit of package [rubygem-openshift-origin-routing-activemq] release [0.5.2-1].
Automatic commit of package [openshift-origin-logshifter] release [1.7.2-1].
Automatic commit of package [rubygem-openshift-origin-controller] release [1.30.3-1].
Automatic commit of package [rubygem-openshift-origin-frontend-apache-vhost] release [0.9.2-1].
Automatic commit of package [rubygem-openshift-origin-console] release [1.30.2-1].
Automatic commit of package [openshift-origin-cartridge-jbossas] release [1.27.2-1].
Automatic commit of package [openshift-origin-cartridge-dependencies] release [1.26.2-1].
Automatic commit of package [openshift-origin-broker-util] release [1.29.2-1].
Automatic commit of package [openshift-origin-node-util] release [1.29.2-1].
bump spec for tag fix
Automatic commit of package [rubygem-openshift-origin-msg-broker-mcollective] release [1.29.1-1].
check for domain environment variable uniqueness on app create