TOOLSDOC-512: Added OS How To 'Deploy Proj to OSO'

@adietish, @maxandersen : please review and leave comments for any suggestions/required changes.
Maybe it's more convenient to use Configure > New/Import OpenShift Application from the context menu of your Eclipse project in the Project Explorer (I think that this is the more intuitive approach if you want to deploy an existing project to OpenShift): https://issues.jboss.org/browse/JBIDE-10546