Add table of recipients

Uses an adapted version of the 'summary table' pattern from Digital Marketplace
frontend toolkit:
http://alphagov.github.io/digitalmarketplace-frontend-toolkit/summary-table.html

app/assets/stylesheets/main.scss

@@ -30,6 +30,7 @@
 @import "components/sms-message";
 @import "components/placeholder";
 @import "components/template-picker";
+@import "components/table";
 
-// Break this uq
+// TODO: break this up into components
 @import "app";