Switch to EDN config file to showcase non-eval problems

Steps to reproduce

1. lein sub install
2. lein new pedestal-app my-proj
3. In my-proj, launch repl
4. Eval (start)
5. Visit http://localhost:3000/my-proj-dev.html

Inspecting `config` shows what look like the appropriate symbol for
my-proj.start, but ClojureScript is choking on these symbols.
Unquote namespace symbols in config.edn

These quotes are no longer necessary, as reading EDN never evaluates
these symbols.