Create "what's new" popup functionality

[ivandotv]

I'm thinking of two ways to implement this:

1. Bundle the "what's new content" directly in the application bundle (like the slideshow)
2. Create a standard that will query api/whats-new where depending on the on the client version doing the query, it will pick up all the changes (might be from the database) and send it as json to the front-end. Then that data will be displayed in the popup.