Add notes about jdk7 usage.
Add notes about jdk7 usage.

dblock/waffle,dblock/waffle,hazendaz/waffle,vimil/waffle,victorbriz/waffle,vimil/waffle,AriSuutariST/waffle,hazendaz/waffle,boyley/waffle,vimil/waffle,boyley/waffle,victorbriz/waffle,dblock/waffle,Waffle/waffle,vimil/waffle,Waffle/waffle,AriSuutariST/waffle,victorbriz/waffle,hazendaz/waffle,boyley/waffle,Waffle/waffle,AriSuutariST/waffle,dblock/waffle,AriSuutariST/waffle