Version bump to v1.6.7
Version bump to v1.6.7

jonathanmorley/iis,visioncritical/iis,owen/iis,drpebcak/iis,spuder/iis,kevinrivers/iis,billclark91/iis,criteo-forks/iis,jsierles/iis,lynx44/iis,mohitsethi/chef-iis,opscode-cookbooks/iis,bahrens/iis,juliandunn/iis,sneal/iis,blairham/iis,cvent/iis,chef-cookbooks/iis