The hiccup dev server now auto-reloads when source files change:
- Background thread polls src/ and dev/hiccup/src/ every 500ms
- On change, reloads dev.hiccup namespace and all transitive deps
- Injects a polling script that hits /dev/changes and reloads the
browser when the version counter bumps
- Server uses #'handler (var ref) so httpkit picks up redefined fns
No more manual server restarts needed for hiccup development.