I'm glad to see this, and I'm hoping to use it. Genie bundled waay too much and was too slow for development. If this cuts down on REPL load times / Revise times, it'll be win in my book.
I still think there's a LOOONGGG way to go for Julia web frameworks, and specifically here there's auth / cookie handling / supporting static assets etc and a number of features I'd like to see enabled as plugins or add ons (not unlike flask). But for now, it seems like a great start.