Add DuckDuckGoGo bookmark

dotfiles/config/bmo/wish.ini

     bri     = https://brilliant.org/
     deb     = https://www.debian.org/distrib/packages
     dd      = http://devdocs.io/
+    ddg     = https://duckduckgo.com/
     disqus  = https://disqus.com/by/aloismahdal/
     dmoz    = http://www.dmoz.org/
     fas     = https://admin.fedoraproject.org/accounts/user/view/netvor