Fix asciidoctor complaints: "ERROR: README.adoc: line 3: only book doctypes can contain level 0 sections"
Fix asciidoctor complaints: "ERROR: README.adoc: line 3: only book doctypes can contain level 0 sections"

eshen1991/optaplanner,droolsjbpm/optaplanner,oskopek/optaplanner,droolsjbpm/optaplanner,tkobayas/optaplanner,gsheldon/optaplanner,eshen1991/optaplanner,droolsjbpm/optaplanner,droolsjbpm/optaplanner,tomasdavidorg/optaplanner,tkobayas/optaplanner,eshen1991/optaplanner,baldimir/optaplanner,baldimir/optaplanner,baldimir/optaplanner,oskopek/optaplanner,tomasdavidorg/optaplanner,tomasdavidorg/optaplanner,oskopek/optaplanner,oskopek/optaplanner,tkobayas/optaplanner,tkobayas/optaplanner,gsheldon/optaplanner,gsheldon/optaplanner,gsheldon/optaplanner,baldimir/optaplanner