add note about only supporting Java 6 and above.
add note about only supporting Java 6 and above.

chris-martin/hocon-python,wmudge/config,leakingtapan/config,roznalex/config,leakingtapan/config,shrutig/config,melrief/config,twitter-forks/config,Kaliber/config-ordered,roznalex/config,malexandert/config,yvvq/config,cprice404/config,wmudge/config,Applied-Duality/config,Applied-Duality/config,Rhinofly/config-ordered,malexandert/config,yvvq/config,meln1k/config,typesafehub/config,rmuhamedgaliev/config,shrutig/config,fpringvaldsen/config,zeq9069/config,typesafehub/config,melrief/config,twitter-forks/config,fpringvaldsen/config,Kaliber/config-ordered,chris-martin/hocon-python,jasonchaffee/config,jasonchaffee/config,rmuhamedgaliev/config,zeq9069/config,meln1k/config,cprice404/config,Rhinofly/config-ordered