added disaster recovery content
added disaster recovery content

tweaked language and added the disaster recovery section in.
R-Brain/codenvy,codenvy/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,R-Brain/codenvy,R-Brain/codenvy,R-Brain/codenvy,codenvy/codenvy,R-Brain/codenvy,codenvy/codenvy,codenvy/codenvy