Document IntelliTect.Coalesce.Swashbuckle

[ascott18]

As the title states. Pretty simple to use it, but still needs to be written down somewhere beyond just "look at Coalesce.Web's Startup.cs"

[ascott18]

Write this as a "topics" page. Look at a before/after of installing it to see what it does (it makes datasource and behaviors parameters less bad) - explain these differences/improvements in the documentation. You could even include screenshots showing the before/after.