Packaging files with Sitecore Courier

It's been a long time since Sitecore Courier was released, I've got a lot of feedback about it, so now it's time to add the next major feature to it: files packaging support.

Initially, the module could handle only items, which was just enough for deploying item changes to your website on release day. But at some point I've realized that it can also replace standard Sitecore Package Designer, providing some additional benefits, which I'll list below.