Allow advanced queries to pull in dsl rules as needed

- Remove unused query' and when checks from custom-query
- Update bb command to use correct watch
- Provide $EXAMPLE mode in query dsl test to document rule usage

src/main/frontend/db/query_dsl.cljs

@@ -1,4 +1,5 @@
 (ns frontend.db.query-dsl
+  "Handles executing dsl queries a.k.a. simple queries"
   (:require [cljs-time.coerce :as tc]
             [cljs-time.core :as t]
             [cljs.reader :as reader]