doc: release notes for 8.0
doc: release notes for 8.0

checkstyle/checkstyle,rnveach/checkstyle,liscju/checkstyle,liscju/checkstyle,sabaka/checkstyle,liscju/checkstyle,checkstyle/checkstyle,romani/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,sabaka/checkstyle,jonmbake/checkstyle,jonmbake/checkstyle,jochenvdv/checkstyle,rnveach/checkstyle,romani/checkstyle,rnveach/checkstyle,romani/checkstyle,sabaka/checkstyle,jochenvdv/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,romani/checkstyle,checkstyle/checkstyle,jonmbake/checkstyle,romani/checkstyle,jochenvdv/checkstyle