Added generated doc to .gitignore.
Added generated doc to .gitignore.

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