Add burgerking parser.
Add McDonald's parser
Add menu.restaurant field.
Merge branch 'master' into multiple-restaurants
Remove signs from menu name.
storage.py now accepts restaurant name
Summary group by restaurant.
Adjust introduction.
No more full-list menu; just show urls.
!help
Bye getall()
Fix url for display.
Merge pull request #14 from jeong-min-lee/multiple-restaurants

Multiple restaurants
Separate menu urls from the following messages.